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MCQOPTIONS
This section includes 559 Mcqs, each offering curated multiple-choice questions to sharpen your Aptitude knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
The average marks obtained by 22 candidates in an examination are 45. The average marks of the first 10 candidates are 55 and those of the last eleven are 40. The number of marks obtained by the eleventh candidate is |
| A. | 45 |
| B. | 0 |
| C. | 50 |
| D. | 47.5 |
| Answer» C. 50 | |
| 552. |
In an examination, the average of marks was found to be 50. For deducting marks for computational errors, the marks of 100 candidates had to be changed from 90 to 60 each and so the average of marks came down to 45. The total number of candidates, who appeared at the examination, was |
| A. | 600 |
| B. | 300 |
| C. | 200 |
| D. | 150 |
| Answer» B. 300 | |
| 553. |
In an exam, the average marks obtained by the students was found to be 60. After omission of computational errors, the average marks of 100 candidates had to be changed from 60 to 30 and the average with respect to all the examinees came down to 45 marks. The total number of candidates who took the exam, was |
| A. | 200 |
| B. | 210 |
| C. | 240 |
| D. | 180 |
| Answer» B. 210 | |
| 554. |
The average of 18 observations is recorded as 124. Later it was found that two observations with values 64 and 28 were entered wrongly as 46 and 82. Find the correct average of the 18 observations. |
| A. | <table><tr><td rowspan="2">111</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>7</center></td></tr><tr><td style="text-align: center;">9</td></tr></table> |
| B. | 122 |
| C. | 123 |
| D. | <table><tr><td rowspan="2">137</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><tr><td style="text-align: center;">9</td></tr></table> |
| Answer» C. 123 | |
| 555. |
The average monthly income of A and B is 14000, that of B and C is 15600 and A and C is 14400. The monthly income of C is |
| A. | 16000 |
| B. | 15000 |
| C. | 14000 |
| D. | 15500 |
| Answer» B. 15000 | |
| 556. |
If the average of 6 consecutive even numbers is 25, the difference between the largest and the smallest number is |
| A. | 8 |
| B. | 10 |
| C. | 12 |
| D. | 14 |
| Answer» C. 12 | |
| 557. |
The average of 15 numbers is 7. If the average of the first 8 numbers be 6.5 and the average of last 8 numbers be 9.5, then the middle number is |
| A. | 20 |
| B. | 21 |
| C. | 23 |
| D. | |
| E. | 18 |
| Answer» D. | |
| 558. |
The average of prime numbers between 1 and 20 is |
| A. | 9 |
| B. | <table><tr><td rowspan="2">9</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">5</td></tr><tr><td style="text-align: center;">8</td></tr></table> |
| C. | <table><tr><td rowspan="2">10</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">1</td></tr><tr><td style="text-align: center;">8</td></tr></table> |
| D. | 8 |
| Answer» E. | |
| 559. |
The average of 20 numbers is calculated as 35. It is discovered later on that while calculating the average, one number, namely 85, was mis read as 45. The correct average is : |
| A. | 36 |
| B. | 36.5 |
| C. | 37 |
| D. | 37.5 |
| Answer» D. 37.5 | |