A group of 5 friends average age 25. If one leaves, average becomes 24. Age of person who left? MCQ with Answer and Explanation

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A group of 5 friends average age 25. If one leaves, average becomes 24. Age of person who left?

A. 28

B. 30

C. 31

D. 29

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum5=125. Sum4=96. Left=29.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 28. If one number 40 is replaced by 25, new average?

A. 28

B. 26.67

C. 27

D. 27.5

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Correct Answer: Option C

Explanation:
Change -15, decrease 1. New=27.

This question belongs to: Maths Average

Question #2

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Average of 1 to 20 except 10 is

A. 9.5

B. 10

C. 11

D. 10.5

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Correct Answer: Option D

Explanation:
Sum=210-10=200. Numbers19. Average≈10.53.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 2680. If average of 6 is 2675, average of remaining 4?

A. 2687.5

B. 2686

C. 2685

D. 2690

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Correct Answer: Option A

Explanation:
Sum10=26800. Sum6=16050. Remaining=10750. Average=2687.5.

This question belongs to: Maths Average

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