The average marks obtained by a group of 10 students were 20. One stud – McqOptions

MCQOPTIONS

1.	The average marks obtained by a group of 10 students were 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.6. What were the average marks obtained by the student who left and the one who joined?_x005F_x000D_
A.	14
B.	15
C.	16
D.	23
Answer» B. 15

Discussion

No Comment Found

Related MCQs

A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average for whole journey.
The average of 20 students is 12 years, if the teacher's age included, average increases by one. The age of the teacher is:
The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 and of girls is 40 kg. The number of boys is:
Average of 80 numbers are 42. 5 more numbers included, the average of 85 numbers become 45. Find the average of 5 numbers.
Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop?
When all the students in a school are made to stand in rows of 54, 30 such rows are formed. If the students are made to stand in rows of 45, how many such rows will be formed ?
What will be the cost of building a fence around a square plot with area equal to 289 sq ft, if the price per foot of building the fence is Rs. 58 ?
What will be the average of the first 7 positive odd numbers divisible by 5?_x005F_x000D_
What is the mean of the marks scored by students in a science exam?_x005F_x000D_ Â _x005F_x000D_ 41, 39, 52, 48, 54, 62, 46, 52, 40, 96, 42, 40, 98, 60, 52_x005F_x000D_
What will be the average of all the prime numbers before 19?