Average of 25 numbers 85. If average of 15 is 90, average of remaining 10? MCQ with Answer and Explanation

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Average of 25 numbers 85. If average of 15 is 90, average of remaining 10?

A. 75

B. 78

C. 80

D. 77.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Total=2125. Sum15=1350. Remaining=775/10=77.5.

This question belongs to: Maths Average

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Question #1

Average of 28,35,42 is

A. 40

B. 30

C. 33

D. 35

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Correct Answer: Option D

Explanation:
105/3=35.

This question belongs to: Maths Average

Question #2

Average of 50 numbers is 38. The number 45 was wrongly written as 54. Correct average?

A. 37.8

B. 39

C. 37.82

D. 38

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Correct Answer: Option C

Explanation:
Error +9, decrease 9/50=0.18, correct average=38-0.18=37.82.

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Question #3

The average of 1320,1760,2200 is

A. 1755

B. 1750

C. 1770

D. 1760

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Correct Answer: Option D

Explanation:
5280/3=1760.

This question belongs to: Maths Average

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