If average of 15 numbers is 50 and average of 5 is 55, average of remaining 10? MCQ with Answer and Explanation

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If average of 15 numbers is 50 and average of 5 is 55, average of remaining 10?

A. 48

B. 47.5

C. 50

D. 45

Answer: Option B

Solution (By JKExamLibrary)

Sum15=750. Sum5=275. Remaining=475. Average=47.5.

This question belongs to: Maths Average

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Question #1

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The average of 9 numbers is 33. If one number is 55, find the average of the remaining 8.

A. 30

B. 30.25

C. 29.75

D. 31

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Correct Answer: Option B

Explanation:
Sum=9×33=297. Remaining sum=297-55=242. Avg=242/8=30.25.

This question belongs to: Maths Average

Question #2

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Average of 10 consecutive numbers is 55.5. Largest number?

A. 61

B. 62

C. 60

D. 59

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Correct Answer: Option C

Explanation:
Largest =55.5 +4.5=60.

This question belongs to: Maths Average

Question #3

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What is the average of squares of first 5 natural numbers?

A. 10

B. 11

C. 55

D. 15

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Correct Answer: Option B

Explanation:
Squares: 1,4,9,16,25. Sum=55. Average=55/5=11.

This question belongs to: Maths Average

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