559 + Mcqs in Average Page 8 McqOptions

351.	The average of marks in Mathematics for 5 students was found to be 50. Later, it was discovered that in the case of one student the marks 48 were misread as 84. The correct average is :
A.	40.2
B.	40.8
C.	42.8
D.	48.2
Answer» D. 48.2

Discussion

352.	The average of a collection of 20 measurements was calculated to be 56 cm. But later it was found that a mistake had occurred in one of the measurements which was recorded as 64 cm., but should have been 61 cm. The correct average must be
A.	53 cm
B.	54.5 cm
C.	55.85 cm
D.	56.15 cm
Answer» D. 56.15 cm

Discussion

353.	The average monthly salary of 19 members of a group is Rs. 16000. If one more member whose monthly salary is Rs. 20000 joins the group, then the average salary of the group is
A.	Rs. 18250
B.	Rs. 16200
C.	Rs. 18000
D.	Rs. 16250
Answer» C. Rs. 18000

Discussion

354.	In a T.V. factory, an average of 60 TVs are produced per day for the fist 25 days of the months. A few workers fell ill for the next five days reducing the daily average for the month to 58 sets per day . The average production per day for day last 5 days is ?
A.	45
B.	48
C.	52
D.	58
Answer» C. 52

Discussion

355.	Three Science classes A, B and C take a Life Science test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. Then the average score of classes A, B and C is
A.	81.5
B.	81
C.	80.5
D.	80
Answer» B. 81

Discussion

356.	The average of 30 numbers is 40 and that of other 40 numbers is 30. The average of all the numbers is
A.	<table><tr><td rowspan="2">34</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">2</td></tr><tr><td style="text-align: center;">7</td></tr></table>
B.	35
C.	34
D.	34.5
Answer» B. 35

Discussion

357.	A library has an average number of 510 visitors on Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with Sunday is :
A.	285
B.	295
C.	300
D.	290
Answer» B. 295

Discussion

358.	Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, then difference of first and third number is
A.	12
B.	20
C.	24
D.	48
Answer» E.

Discussion

359.	The average of three numbers is 77. The first number is twice the second and the second number is twice the third. The first number is :
A.	33
B.	66
C.	77
D.	132
Answer» E.

Discussion

360.	Of the three numbers, first is twice the second and second is twice the third. The average of three numbers is 21. The smallest of the three numbers is
A.	9
B.	6
C.	12
D.	18
Answer» B. 6

Discussion

361.	Of the three numbers, second is twice the first and also thrice the third. If the average of the three numbers is 44, the largest number is :
A.	24
B.	72
C.	36
D.	108
Answer» C. 36

Discussion

362.	A man spends in 8 months as much as he earns in 6 months. He saves Rs. 6000 in a year. His average monthly income is :
A.	Rs. 2400
B.	Rs. 2000
C.	Rs. 2150
D.	Rs. 1800
Answer» C. Rs. 2150

Discussion

363.	Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is
A.	54
B.	28
C.	39.5
D.	41.5
Answer» B. 28

Discussion

364.	The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next inning so as to increase his average of runs by 4 ?
A.	76
B.	70
C.	4
D.	2
Answer» B. 70

Discussion

365.	The average age of the boys in a class is 18 years. The average age of the girls in that class is 12 years. If the ratio of the number of boys and girls in that class is 3 : 2, then the average age of the class is :
A.	15. 6 years
B.	16. 5 years
C.	15 years
D.	16 years
Answer» B. 16. 5 years

Discussion

366.	The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is :
A.	28
B.	42
C.	32
D.	45
Answer» C. 32

Discussion

367.	Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included, the average is increased by 1 kg. The weight of the teacher is
A.	76 kg
B.	77 kg
C.	74 kg
D.	75 kg
Answer» B. 77 kg

Discussion

368.	Ram is 20 years younger than Shyam. 5 years ago, the ratio of their ages was 3 : 5. The sum of their present ages is :
A.	75 years
B.	80 years
C.	90 years
D.	95 years
Answer» D. 95 years

Discussion

369.	An army of 12000 consists of Europeans and Indians. The average height of a European is 5ft 10 inches and that
A.	3000
B.	4000
C.	5500
D.	2700
Answer» B. 4000

Discussion

370.	A and B have their annual average income Rs. 80,000. B and C have their annual average income Rs. 75,000. C and A have their annual average income Rs. 78,000. The annual income of A is
A.	Rs. 81000
B.	Rs. 82000
C.	Rs. 83000
D.	Rs. 84000
Answer» D. Rs. 84000

Discussion

371.	A tabulator while calculating the average marks of 100 students of an examination, by mistake enters 68, instead of 86 and obtained the average as 58; the actual average marks of those students is
A.	58.18
B.	57.82
C.	58.81
D.	57.28
Answer» B. 57.82

Discussion

372.	Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is
A.	25.5
B.	32
C.	30
D.	34 5
Answer» B. 32

Discussion

373.	A boy found that the average of 20 numbers is 35 when he writes a number 61 instead of 16 . The correct average of 20 numbers is
A.	32.75
B.	37.25
C.	34.75
D.	34.25
Answer» B. 37.25

Discussion

374.	The average weight of 12 crewmen in a boat is increased by 1/3 kg, when one of the crewmen whose weight is 55 kg is replaced by a new man. What is the weight of that new man?
A.	58 kg
B.	60 kg
C.	57 kg
D.	59 kg
Answer» E.

Discussion

375.	A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given numbers and got the average as 50. The correct average of the numbers is :
A.	48.2
B.	48
C.	48.1
D.	49
Answer» B. 48

Discussion

376.	The average marks obtained by a student in 6 subjects is 88. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks obtained by him is
A.	87
B.	85
C.	84
D.	86
Answer» C. 84

Discussion

377.	The average of 20 numbers is calculated as 35. It is dicovered later, that while calculating the average, one number, namely 85, was read as 45. The correct average is
A.	36.5
B.	37
C.	37.5
D.	36
Answer» C. 37.5

Discussion

378.	The average run of a player is 32 out of 10 innings. How many runs must he make in the next innings so as to increase his average by 6 ?
A.	38
B.	40
C.	6
D.	98
Answer» E.

Discussion

379.	A cricketer whose bowling average is 12.4 runs per wicket, takes 5 wickets for 26 runs and thereby decreases his average by 0.4. The number of wickets taken by him till the last match was
A.	64
B.	72
C.	80
D.	85
Answer» E.

Discussion

380.	A cricket player after playing 10 tests scored 100 runs in the 11th test. As a result, the average of his runs is increased by 5. The present average of runs is
A.	45
B.	40
C.	50
D.	55
Answer» D. 55

Discussion

381.	The average age of 5 boys is 12 years. The average age of 3 others is 16 years. The average age of all the 8 boys is :
A.	<table><tr><td rowspan="2">13</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">1</td><td rowspan="2">years</td></tr><tr><td style="text-align: center;">2</td></tr></table>
B.	14 years
C.	<table><tr><td rowspan="2">12</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">1</td><td rowspan="2">years</td></tr><tr><td style="text-align: center;">2</td></tr></table>
D.	13 years
Answer» B. 14 years

Discussion

382.	There are 30 students in a class. The average age of first 10 students is 12.5 years. The average age of the remaining 20 students is 13.1 years. The average age (in years) of the students of the whole class is
A.	12.5 years
B.	12.7 years
C.	12.8 years
D.	12.9 years
Answer» E.

Discussion

383.	The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg).
A.	55 kg
B.	57 kg
C.	66 kg
D.	56 kg
Answer» E.

Discussion

384.	A man purchases milk for three consecutive years. In the first year, he purchases milk at the rate of 7.50 per litre, in the second year, at the rate of 8.00 per litre and in the third year, at 8.50 per litre. If he purchases milk worth 4,080 each year, the aver-age price of milk per litre for the three years is
A.	7.68
B.	7.98
C.	7.54
D.	7.83
Answer» C. 7.54

Discussion

385.	While purchasing one item costing 400, one has to pay sales tax at 7% and on another costing 6400, the sales tax was 9%. The per cent of sales tax one has to pay, taking these items together on an average is:
A.	<table><tr><td rowspan="2">8</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">13</td></tr><tr><td style="text-align: center;">17</td></tr></table>
B.	<table><tr><td rowspan="2">8</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">15</td></tr><tr><td style="text-align: center;">17</td></tr></table>
C.	<table><tr><td rowspan="2">8</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">1</td></tr><tr><td style="text-align: center;">2</td></tr></table>
D.	8
Answer» C. <table><tr><td rowspan="2">8</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">1</td></tr><tr><td style="text-align: center;">2</td></tr></table>

Discussion

386.	Out of nine persons, 8 persons spent 30 each for their meals. The ninth one spent 20 more than the average expenditure of all the nine. The total money spent by all of them was
A.	260
B.	290
C.	292.50
D.	400.50
Answer» D. 400.50

Discussion

387.	If the average of x and 1 / x (x 0) is M, then the average of x2 and 1is :x
A.	1 M
B.	1 2M
C.	2M 1
D.	2M + 1
Answer» D. 2M + 1

Discussion

388.	The average of marks obtained by 120 candidates was 35. If the average of marks of passed candidates was 39 and that of failed candidates was 39 and that of failed candidates was 15, the number of candidates who passed the examination is ?
A.	100
B.	110
C.	120
D.	150
Answer» B. 110

Discussion

389.	The average mathematics marks of two Sections A and B of Class IX in the annual examination is 74. The average marks of Section A is 77.5 and that of Section B is 70. The ratio of the number of students of Section A and B is
A.	7 : 8
B.	7 : 5
C.	8 : 7
D.	8 : 5
Answer» D. 8 : 5

Discussion

390.	B was born when A was 4 years 7 months old and C was born when B was 3 years 4 months old. When C was 5 years 2 months old, then their average age was
A.	8 years 9 months
B.	7 years 3 months
C.	8 years 7 months
D.	8 years 11 months
Answer» E.

Discussion

391.	The average of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of boys is 60. What is the percentage of boys in the class ?
A.	40 %
B.	60 %
C.	65 %
D.	70 %
Answer» C. 65 %

Discussion

392.	The average of three numbers is 42. The first is twice the second and the second is twice the third. What is the difference between the largest and the smallest number?
A.	50
B.	46
C.	48
D.	54
Answer» E.

Discussion

393.	The average salary of 12 officers in a factory is Rs. 3950 per month and that of other employees of the factory is Rs. 1850 per month. If the average salary of all employees (including the officers) of the factory be Rs. 2150 per month, find the total number of employees in the factory.
A.	80
B.	85
C.	84
D.	86
Answer» D. 86

Discussion

394.	A cricketer has a certain average for 10 inning. In the eleventh innings. he scored 216 runs, there by increasing his average by 12 runs. Find out his new average?
A.	96
B.	84
C.	97
D.	87
E.	None of the above
Answer» B. 84

Discussion

395.	A cricketer whose bowling average is 12.4 runs per wicket, takes 5 wickets for 26 runs and there by decreases his average by 0.4. Find out the number of wickets taken by him till the last match ?
A.	75
B.	81
C.	85
D.	79
E.	None of the above
Answer» D. 79

Discussion

396.	A has double the money of B and B has 50% more money then C. If average money of all the three persons is 12000, how money does A have ?
A.	211000/11
B.	315000/11
C.	216000/11
D.	316000/11
E.	None of the above
Answer» D. 316000/11

Discussion

397.	The average age of two boys and their father is greater then average age of those two boys and their mother by 3 yr. The average age of the four is 19 yr. If the average age of the two boys be 5
A.	37 yr and 28 yr
B.	47 yr and 38 yr
C.	50 yr and 41 yr
D.	35 yr and 32 yr
Answer» B. 47 yr and 38 yr

Discussion

398.	A cricketer played 80 innings and scored an average of 99 runs. His score in the last inning is zero run. To have an average of 100 at the end, his score in the last innings should have been.
A.	10 runs
B.	1 runs
C.	60 runs
D.	80 runs
Answer» E.

Discussion

399.	The daily minimum temperature of a place in a certain week. begining from Monday was 20 , 18.6 , 17 , 21.4 , 19 and 19.8 . It was known that the average of whole week was 19.5 . The minimum temperature on Sunday was ?
A.	16.9
B.	11.6
C.	20.7
D.	12.6
Answer» D. 12.6

Discussion

400.	The average runs scored by a cricketer is 42 innings, is 30. The difference between his maximum and minimum scores in an inning is 100. If these two innings are not taken into consideration, then the average score of remaining 40 inning is 28. Calculate the maximum runs scored by him in an innings ?
A.	125
B.	120
C.	110
D.	100
Answer» C. 110

Discussion

Explore topic-wise MCQs in Aptitude.

The average of marks in Mathematics for 5 students was found to be 50. Later, it was discovered that in the case of one student the marks 48 were misread as 84. The correct average is :

The average of a collection of 20 measurements was calculated to be 56 cm. But later it was found that a mistake had occurred in one of the measurements which was recorded as 64 cm., but should have been 61 cm. The correct average must be

The average monthly salary of 19 members of a group is Rs. 16000. If one more member whose monthly salary is Rs. 20000 joins the group, then the average salary of the group is

In a T.V. factory, an average of 60 TVs are produced per day for the fist 25 days of the months. A few workers fell ill for the next five days reducing the daily average for the month to 58 sets per day . The average production per day for day last 5 days is ?

Three Science classes A, B and C take a Life Science test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. Then the average score of classes A, B and C is

The average of 30 numbers is 40 and that of other 40 numbers is 30. The average of all the numbers is

A library has an average number of 510 visitors on Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with Sunday is :

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, then difference of first and third number is

The average of three numbers is 77. The first number is twice the second and the second number is twice the third. The first number is :

Of the three numbers, first is twice the second and second is twice the third. The average of three numbers is 21. The smallest of the three numbers is

Of the three numbers, second is twice the first and also thrice the third. If the average of the three numbers is 44, the largest number is :

A man spends in 8 months as much as he earns in 6 months. He saves Rs. 6000 in a year. His average monthly income is :

Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next inning so as to increase his average of runs by 4 ?

The average age of the boys in a class is 18 years. The average age of the girls in that class is 12 years. If the ratio of the number of boys and girls in that class is 3 : 2, then the average age of the class is :

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is :

Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included, the average is increased by 1 kg. The weight of the teacher is

Ram is 20 years younger than Shyam. 5 years ago, the ratio of their ages was 3 : 5. The sum of their present ages is :

An army of 12000 consists of Europeans and Indians. The average height of a European is 5ft 10 inches and that

A and B have their annual average income Rs. 80,000. B and C have their annual average income Rs. 75,000. C and A have their annual average income Rs. 78,000. The annual income of A is

A tabulator while calculating the average marks of 100 students of an examination, by mistake enters 68, instead of 86 and obtained the average as 58; the actual average marks of those students is

Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is

A boy found that the average of 20 numbers is 35 when he writes a number 61 instead of 16 . The correct average of 20 numbers is

The average weight of 12 crewmen in a boat is increased by 1/3 kg, when one of the crewmen whose weight is 55 kg is replaced by a new man. What is the weight of that new man?

A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given numbers and got the average as 50. The correct average of the numbers is :

The average marks obtained by a student in 6 subjects is 88. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks obtained by him is

The average of 20 numbers is calculated as 35. It is dicovered later, that while calculating the average, one number, namely 85, was read as 45. The correct average is

The average run of a player is 32 out of 10 innings. How many runs must he make in the next innings so as to increase his average by 6 ?

A cricketer whose bowling average is 12.4 runs per wicket, takes 5 wickets for 26 runs and thereby decreases his average by 0.4. The number of wickets taken by him till the last match was

A cricket player after playing 10 tests scored 100 runs in the 11th test. As a result, the average of his runs is increased by 5. The present average of runs is

The average age of 5 boys is 12 years. The average age of 3 others is 16 years. The average age of all the 8 boys is :

There are 30 students in a class. The average age of first 10 students is 12.5 years. The average age of the remaining 20 students is 13.1 years. The average age (in years) of the students of the whole class is

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg).

While purchasing one item costing 400, one has to pay sales tax at 7% and on another costing 6400, the sales tax was 9%. The per cent of sales tax one has to pay, taking these items together on an average is:

Out of nine persons, 8 persons spent 30 each for their meals. The ninth one spent 20 more than the average expenditure of all the nine. The total money spent by all of them was

If the average of x and 1 / x (x 0) is M, then the average of x2 and 1is :x

The average of marks obtained by 120 candidates was 35. If the average of marks of passed candidates was 39 and that of failed candidates was 39 and that of failed candidates was 15, the number of candidates who passed the examination is ?

The average mathematics marks of two Sections A and B of Class IX in the annual examination is 74. The average marks of Section A is 77.5 and that of Section B is 70. The ratio of the number of students of Section A and B is

B was born when A was 4 years 7 months old and C was born when B was 3 years 4 months old. When C was 5 years 2 months old, then their average age was

The average of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of boys is 60. What is the percentage of boys in the class ?

The average of three numbers is 42. The first is twice the second and the second is twice the third. What is the difference between the largest and the smallest number?

The average salary of 12 officers in a factory is Rs. 3950 per month and that of other employees of the factory is Rs. 1850 per month. If the average salary of all employees (including the officers) of the factory be Rs. 2150 per month, find the total number of employees in the factory.

A cricketer has a certain average for 10 inning. In the eleventh innings. he scored 216 runs, there by increasing his average by 12 runs. Find out his new average?

A cricketer whose bowling average is 12.4 runs per wicket, takes 5 wickets for 26 runs and there by decreases his average by 0.4. Find out the number of wickets taken by him till the last match ?

A has double the money of B and B has 50% more money then C. If average money of all the three persons is 12000, how money does A have ?

The average age of two boys and their father is greater then average age of those two boys and their mother by 3 yr. The average age of the four is 19 yr. If the average age of the two boys be 5

A cricketer played 80 innings and scored an average of 99 runs. His score in the last inning is zero run. To have an average of 100 at the end, his score in the last innings should have been.

The daily minimum temperature of a place in a certain week. begining from Monday was 20 , 18.6 , 17 , 21.4 , 19 and 19.8 . It was known that the average of whole week was 19.5 . The minimum temperature on Sunday was ?