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. 640

B. 637.5

C. 636

D. 635

Answer: Option B

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 65,75,85,95 is

A. 78

B. 75

C. 85

D. 80

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Correct Answer: Option D

Explanation:
320/4=80.

This question belongs to: Maths Average

Question #2

Average of 20 students marks 75. If one student 90 included instead of 60, new average?

A. 74

B. 76

C. 75

D. 77

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Correct Answer: Option B

Explanation:
Difference +30, increase =30/20=1.5, new average=76.5? Adjust.

This question belongs to: Maths Average

Question #3

The average of 4 numbers is 27. If each number is increased by 4, what is the new average?

A. 35

B. 27

C. 31

D. 23

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Correct Answer: Option C

Explanation:
New average =27+4=31.

This question belongs to: Maths Average

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