Average of 12 numbers 40. If average of 8 is 38, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 40. If average of 8 is 38, average of remaining 4?

A. 46

B. 45

C. 44

D. 42

Answer: Option C

Solution (By JKExamLibrary)

Sum12=480. Sum8=304. Remaining=176. Average=44.

This question belongs to: Maths Average

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Question #1

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The average of 10 numbers is increased by 2 when one number 15 is replaced by another. What is the new number?

A. 25

B. 30

C. 35

D. 40

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Correct Answer: Option C

Explanation:
Increase in sum =10×2=20. New number =15+20=35.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 570. If average of 8 is 565, average of remaining 4?

A. 580

B. 578

C. 575

D. 582

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Correct Answer: Option A

Explanation:
Sum12=6840. Sum8=4520. Remaining=2320. Average=580.

This question belongs to: Maths Average

Question #3

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Average of 9 numbers 1590. If average of 6 is 1585, average of remaining 3?

A. 1595

B. 1600

C. 1605

D. 1598

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Correct Answer: Option B

Explanation:
Sum9=14310. Sum6=9510. Remaining=4800. Average=1600.

This question belongs to: Maths Average

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