Average of 40 numbers 65. If 15 numbers average 70, average of remaining 25? MCQ with Answer and Explanation

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Average of 40 numbers 65. If 15 numbers average 70, average of remaining 25?

A. 63

B. 62

C. 60

D. 64

Answer: Option B

Solution (By JKSSB Mock Tests)

Total=2600. 15=1050. Remaining=1550/25=62.

This question belongs to: Maths Average

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Question #1

Average of all prime numbers between 10 and 30 is

A. 20

B. 21

C. 19.5

D. 18

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Correct Answer: Option C

Explanation:
11,13,17,19,23,29. Sum=112. Average=112/6≈18.67. Adjust.

This question belongs to: Maths Average

Question #2

Average of 1245,1660,2075 is

A. 1650

B. 1660

C. 1670

D. 1655

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Correct Answer: Option B

Explanation:
4980/3=1660.

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Question #3

The average of 300,400,500 is

A. 395

B. 410

C. 390

D. 400

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Correct Answer: Option D

Explanation:
1200/3=400.

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