The average of 3 numbers is 15. If each number is multiplied by 2, what is the new average? MCQ with Answer and Explanation

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The average of 3 numbers is 15. If each number is multiplied by 2, what is the new average?

A. 30

B. 60

C. 15

D. 45

Answer: Option A

Solution (By JKExamLibrary)

New average =15×2=30.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 2090. If average of 6 is 2085, average of remaining 3?

A. 2105

B. 2095

C. 2100

D. 2098

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Correct Answer: Option C

Explanation:
Sum9=18810. Sum6=12510. Remaining=6300. Average=2100.

This question belongs to: Maths Average

Question #2

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Average of 30 numbers 55. If average of 20 is 50, average of remaining 10?

A. 62

B. 60

C. 65

D. 70

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Correct Answer: Option C

Explanation:
Sum30=1650. Sum20=1000. Remaining=650. Average=65.

This question belongs to: Maths Average

Question #3

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The average of 5 numbers is 32. If one number is excluded, the average becomes 30. Find the excluded number.

A. 36

B. 40

C. 38

D. 42

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Correct Answer: Option B

Explanation:
Sum of 5 =160. Sum of 4=4×30=120. Excluded=160-120=40.

This question belongs to: Maths Average

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