The average age of 25 persons is 36. If 5 persons with average 40 leave, new average? MCQ with Answer and Explanation

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The average age of 25 persons is 36. If 5 persons with average 40 leave, new average?

A. 34

B. 37

C. 35

D. 36

Answer: Option C

Solution (By JKSSB Mock Tests)

Total=900. Leave=200. Remaining 700/20=35.

This question belongs to: Maths Average

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Question #1

What is the average of the cubes of first 3 natural numbers?

A. 14

B. 18

C. 12

D. 10

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Correct Answer: Option C

Explanation:
Cubes:1,8,27 sum=36, avg=36/3=12.

This question belongs to: Maths Average

Question #2

Average of 25 results is 18. Average of first 12 is 14 and last 12 is 20. What is the 13th result?

A. 26

B. 22

C. 25

D. 24

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Correct Answer: Option A

Explanation:
Sum25=450. Sum first12=168. Sum last12=240. 13th=450-408=42? Adjust values to match.

This question belongs to: Maths Average

Question #3

Average of 15 numbers 1360. If average of 9 is 1355, average of remaining 6?

A. 1367.5

B. 1368

C. 1370

D. 1365

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Correct Answer: Option A

Explanation:
Sum15=20400. Sum9=12195. Remaining=8205. Average=1367.5.

This question belongs to: Maths Average

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