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

B. 23.75

C. 24.5

D. 23.5

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 6 numbers is 18. If one number is 12, find the average of the remaining 5.

A. 19.2

B. 18.6

C. 19

D. 18.4

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Correct Answer: Option A

Explanation:
Sum=6×18=108. Remaining sum=108-12=96. Avg=96/5=19.2.

This question belongs to: Maths Average

Question #2

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Average of 20 numbers 180. If average of 12 is 175, average of remaining 8?

A. 185

B. 187.5

C. 190

D. 188

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Correct Answer: Option B

Explanation:
Sum20=3600. Sum12=2100. Remaining=1500. Average=187.5.

This question belongs to: Maths Average

Question #3

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The average of 780,1040,1300 is

A. 1030

B. 1040

C. 1035

D. 1050

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Correct Answer: Option B

Explanation:
3120/3=1040.

This question belongs to: Maths Average

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