Mathematics (Average)

By NexisGrow / October 1, 2024

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Key Details:

Topic: Averages (Mean)
Number of Questions: 10
Time Limit: 1 minute per question
Level: Intermediate
Skills Tested: Calculating means, adjusting averages after data corrections, handling arithmetic operations, and data interpretation.

1 / 10

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected (new) mean is

36.1

35.2

36.5

39.1

2 / 10

The average of 25 observations is 13. It was later found that an observation 73 was wrongly entered as 48. The new average is-

12.6

13.8

3 / 10

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third numbers

216

297

661

431

4 / 10

The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12, find the 4th number.

48/7

18/7

5 / 10

The average of four consecutive odd numbers is 40. What is the largest number?

6 / 10

The average of four consecutive odd numbers is 40. What is the largest number?

7 / 10

The average of three consecutive even numbers is A. If next five even numbers are added, what is the average of these eight numbers?

A + 3

A + 4

A + 5

A + 7

8 / 10

The average of three consecutive even numbers is A. If next five even numbers are added, what is the average of these eight numbers?

A + 3

A + 4

A + 5

A + 7

9 / 10

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-

10 / 10

The average of 9 numbers is 30. The average of first 5 numbers is 25 and that of the last 3 numbers is 35. What is the 6th number?

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Mathematics (Average)

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