Average of 15 numbers 660. If average of 9 is 655, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 660. If average of 9 is 655, average of remaining 6?

A. 670

B. 665

C. 668

D. 667.5

Answer: Option D

Solution (By JKExamLibrary)

Sum15=9900. Sum9=5895. Remaining=4005. Average=667.5.

This question belongs to: Maths Average

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Find the average of the first 8 multiples of 4.

A. 20

B. 22

C. 18

D. 16

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Correct Answer: Option C

Explanation:
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This question belongs to: Maths Average

Question #2 Report Error

The average age of husband and wife was 25 years 5 years ago. What will be their average age 5 years from now?

A. 25

B. 30

C. 40

D. 35

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Correct Answer: Option D

Explanation:
5 years ago average 25, so current average 30. 5 years later average =30+5=35.

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Question #3 Report Error

The average of 35 numbers is 25. If 5 numbers average 30 are included, new average of 40?

A. 25.625

B. 26

C. 24

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Correct Answer: Option A

Explanation:
Total35=875. Added=150. Total1025/40=25.625.

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