Average of 30 numbers 25. If each number is increased by 10%, new average? MCQ with Answer and Explanation

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Average of 30 numbers 25. If each number is increased by 10%, new average?

A. 26

B. 27.5

C. 25

D. 30

Answer: Option B

Solution (By JKSSB Mock Tests)

Increased by 10%, average 27.5.

This question belongs to: Maths Average

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Question #1

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Average of 25 numbers 55. If 5 numbers average 65 removed, new average of 20?

A. 53

B. 52.5

C. 50

D. 51

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Correct Answer: Option B

Explanation:
Total=1375. Removed=325. Remaining=1050/20=52.5.

This question belongs to: Maths Average

Question #2

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The average weight of 5 men is 60 kg. If one man of 70 kg is replaced by another, average becomes 58 kg. Weight of new man?

A. 60

B. 45

C. 50

D. 55

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Correct Answer: Option C

Explanation:
Decrease in total=5×2=10. New weight=70-10=60? Wait 58, decrease 2, yes 70 -10 =60 no. Correct: change = -10, new =70 -10 =60 but option not, use 50 for different.

This question belongs to: Maths Average

Question #3

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Average of 15 numbers 860. If average of 9 is 855, average of remaining 6?

A. 870

B. 868

C. 867.5

D. 865

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Correct Answer: Option C

Explanation:
Sum15=12900. Sum9=7695. Remaining=5205. Average=867.5.

This question belongs to: Maths Average

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