Average of 15 numbers 910. If average of 9 is 905, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 910. If average of 9 is 905, average of remaining 6?

A. 917.5

B. 915

C. 920

D. 918

Answer: Option A

Solution (By JKExamLibrary)

Sum15=13650. Sum9=8145. Remaining=5505. Average=917.5.

This question belongs to: Maths Average

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Question #1

Average of 45,55,65 is

A. 60

B. 55

C. 50

D. 52

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Correct Answer: Option B

Explanation:
Sum=165. Average=55.

This question belongs to: Maths Average

Question #2

The average of 5 numbers is 24. If one number is excluded, the average of the remaining 4 numbers becomes 20. What is the excluded number?

A. 48

B. 44

C. 40

D. 36

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Correct Answer: Option C

Explanation:
Total of 5 numbers = 5×24 = 120. Total of remaining 4 numbers = 4×20 = 80. Excluded number = 120−80 = 40.

This question belongs to: Maths Average

Question #3

If average of 8 numbers is 25 and average of 5 is 20, average of remaining 3 is

A. 33.33

B. 35

C. 32

D. 30

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Correct Answer: Option A

Explanation:
Sum8=200. Sum5=100. Remaining sum=100. Average=100/3≈33.33.

This question belongs to: Maths Average

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