The average age of 5 persons is 25 years. If one person aged 30 leaves, what is the average of the remaining? MCQ with Answer and Explanation

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The average age of 5 persons is 25 years. If one person aged 30 leaves, what is the average of the remaining?

A. 24.5

B. 23.75

C. 23.5

D. 24

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=5×25=125. New sum=125-30=95. Avg=95/4=23.75.

This question belongs to: Maths Average

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Question #1

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The average of 9 numbers is 33. If one number is 55, find the average of the remaining 8.

A. 30.25

B. 31

C. 30

D. 29.75

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Correct Answer: Option A

Explanation:
Sum=9×33=297. Remaining sum=297-55=242. Avg=242/8=30.25.

This question belongs to: Maths Average

Question #2

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The average of 1560,2080,2600 is

A. 2090

B. 2070

C. 2080

D. 2075

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Correct Answer: Option C

Explanation:
6240/3=2080.

This question belongs to: Maths Average

Question #3

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Average of 8 numbers 250. If average of 5 is 245, average of remaining 3?

A. 258.33

B. 257

C. 260

D. 255

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Correct Answer: Option A

Explanation:
Sum8=2000. Sum5=1225. Remaining=775. Average≈258.33.

This question belongs to: Maths Average

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