Average of first 10 multiples of 9 is MCQ with Answer and Explanation

Average of first 10 multiples of 9 is

A. 49.5

B. 45

C. 54.5

D. 50

Answer: Option A

9*(1+10)/2 =9*5.5=49.5.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 21,35,49 is

A. 32

B. 30

C. 40

D. 35

Correct Answer: Option D

Explanation:
Sum=105. Average=35.

This question belongs to: Maths Average

Question #2 Report Error

Average of 9,27,45 is

A. 28

B. 25

C. 30

D. 27

Correct Answer: Option D

Explanation:
Sum=81. Average=27.

This question belongs to: Maths Average

Question #3 Report Error

Average of 12 numbers 2470. If average of 8 is 2465, average of remaining 4?

A. 2480

B. 2475

C. 2478

D. 2482

Correct Answer: Option A

Explanation:
Sum12=29640. Sum8=19720. Remaining=9920. Average=2480.

This question belongs to: Maths Average