Average of 12 numbers 220. If average of 8 is 215, average of remaining 4? MCQ with Answer and Explanation

Average of 12 numbers 220. If average of 8 is 215, average of remaining 4?

A. 225

B. 232

C. 230

D. 228

Answer: Option C

Sum12=2640. Sum8=1720. Remaining=920. Average=230.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 8 numbers is 34. If each number is multiplied by 1.5, what is the new average?

A. 51

B. 34

C. 68

D. 25.5

Correct Answer: Option A

Explanation:
New average =34×1.5=51.

This question belongs to: Maths Average

Question #2 Report Error

Average of 1 to 20 is

A. 11

B. 9.5

C. 10

D. 10.5

Correct Answer: Option D

Explanation:
(20×21)/2 /20 =10.5.

This question belongs to: Maths Average

Question #3 Report Error

Average of 16 numbers 25. If 4 numbers average 30, average of remaining 12?

A. 23.33

B. 22

C. 25

D. 24

Correct Answer: Option A

Explanation:
Sum16=400. Sum4=120. Remaining=280/12≈23.33.

This question belongs to: Maths Average