Average of 15 numbers 2510. If average of 9 is 2505, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 2510. If average of 9 is 2505, average of remaining 6?

A. 2517.5

B. 2515

C. 2520

D. 2518

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum15=37650. Sum9=22545. Remaining=15105. Average=2517.5.

This question belongs to: Maths Average

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Question #1

The average of 8 numbers is 40. If one number is 20, find the average of the remaining 7.

A. 42.86

B. 42

C. 43

D. 41.5

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Correct Answer: Option A

Explanation:
Sum=8×40=320. Remaining sum=320-20=300. Avg=300/7=42.86.

This question belongs to: Maths Average

Question #2

A cricketer has average 30 after 10 innings. How many runs to score in 11th to make average 32?

A. 50

B. 52

C. 55

D. 48

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Correct Answer: Option B

Explanation:
Total after 11 =11×32=352. Runs in 10=300. Required=52.

This question belongs to: Maths Average

Question #3

Average of 285,380,475 is

A. 375

B. 370

C. 390

D. 380

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Correct Answer: Option D

Explanation:
1140/3=380.

This question belongs to: Maths Average

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