Average of 10 numbers 630. If average of 6 is 625, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 630. If average of 6 is 625, average of remaining 4?

A. 637.5

B. 635

C. 640

D. 636

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum10=6300. Sum6=3750. Remaining=2550. Average=637.5.

This question belongs to: Maths Average

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Question #1

Average of 8 numbers is 50. If average of 5 is 45, average of other 3?

A. 60

B. 55

C. 58.33

D. 50

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Correct Answer: Option C

Explanation:
Sum8=400. Sum5=225. Remaining=175. Average≈58.33.

This question belongs to: Maths Average

Question #2

Average of 20 numbers is 45. Later two numbers 30 and 50 replaced by 40 and 60, new average?

A. 44

B. 45

C. 46

D. 47

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Correct Answer: Option C

Explanation:
Net change +20. Increase 1. New average=46.

This question belongs to: Maths Average

Question #3

The average of 7 numbers is 26. If one number is 32, find the average of the remaining 6.

A. 25

B. 25.5

C. 24.5

D. 26

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Correct Answer: Option A

Explanation:
Sum=7×26=182. Remaining sum=182-32=150. Avg=150/6=25.

This question belongs to: Maths Average

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