Average of 15 numbers 2610. If average of 9 is 2605, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 2610. If average of 9 is 2605, average of remaining 6?

A. 2620

B. 2617.5

C. 2615

D. 2618

Answer: Option B

Solution (By JKExamLibrary)

Sum15=39150. Sum9=23445. Remaining=15705. Average=2617.5.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 5 numbers is 33. If each number is decreased by 2, what is the new average?

A. 31

B. 35

C. 33

D. 29

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Correct Answer: Option A

Explanation:
New average =33-2=31.

This question belongs to: Maths Average

Question #2 Report Error

The average of first 6 multiples of 7 is

A. 24.5

B. 25

C. 21

D. 28

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Correct Answer: Option A

Explanation:
7*(1+6)/2=7*3.5=24.5.

This question belongs to: Maths Average

Question #3 Report Error

Average of 20 numbers is 45. If 5 numbers with average 50 are removed, new average?

A. 44

B. 45

C. 43.33

D. 42

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Correct Answer: Option C

Explanation:
Sum20=900. Sum5=250. Remaining sum=650. Numbers15. Average≈43.33.

This question belongs to: Maths Average

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