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The average marks of 50 students in an e...

The average marks of 50 students in an examination was 65. It was later found that the marks of one student had been wrongly entered as 83 instead of 38. The correct average is?

A

63.9

B

64.5

C

64.7

D

64.1

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The correct Answer is:
D
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The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is:

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The average marks of 42 students in an examination, was 64. Later it was found that the marks of three students were misread as 72, 58 and 44 instead of the actual marks 64, 42 and 26 respectively. What is the correct average marks?

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GAGAN PRATAP -AVERAGE-Multiple Choice Questions
  1. The average of 60 student’s results is 38. If the average of the first...

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  2. The average of 33 numbers is 74. The average of the first 17 numbers i...

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  3. The average marks of 50 students in an examination was 65. It was late...

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  4. In a class, the average score of thirty students on a test is 69. Late...

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  5. The average marks of 40 students was found to be 68. If the marks of t...

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  6. The average of 100 numbers is 63, but it was found that 2 numbers 37 &...

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  7. The average age of a number of persons in a group’ was calculated as 3...

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  8. The average of the ages of a group of 65 men is 32 years. If 5 men...

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  9. The average of 18 numbers is 37.5. If six numbers of average x are add...

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  10. The average weight of some students in a class was 58.4kg. When 5 stud...

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  11. The average weight of the students in a group 75.4 kg. Later on, four ...

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  12. The average weight of a certain number of students in a group is 72 kg...

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  13. While tabulation of marks scored in an examination by the students of ...

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  14. The average of n observations is 40. If one observation of value 80 is...

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  15. The average age of 24 students is 15.5 years. The age of the teacher i...

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  16. Three numbers are such that if the average of any two of them is added...

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  17. The average of eleven numbers is 68. The average of the first four num...

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  18. The average of thirteen numbers is 80. The average of the first five n...

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  19. The average of 24 numbers is 56. The average of the first 10 numbers i...

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  20. The average marks of 30 boys is 88, and when the top scores were exclu...

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