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. 62

B. 63

C. 64

D. 60

Answer: Option A

Solution (By JKExamLibrary)

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

This question belongs to: Maths Average

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Question #1 Report Error

Average of 10 numbers 28. If average of 6 is 25, average of remaining 4?

A. 32.5

B. 33

C. 30

D. 35

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Correct Answer: Option A

Explanation:
Sum10=280. Sum6=150. Remaining=130. Average=32.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of all prime numbers between 10 and 30 is

A. 20

B. 21

C. 18

D. 19.5

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Correct Answer: Option D

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

This question belongs to: Maths Average

Question #3 Report Error

Average of 5,10,15,20,25,30 is

A. 15

B. 17.5

C. 18

D. 20

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Correct Answer: Option B

Explanation:
Sum=105. Average=17.5.

This question belongs to: Maths Average

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