The average of 5 numbers is 31. If each number is multiplied by 2 and then 4 is added, what is the new average? MCQ with Answer and Explanation

The average of 5 numbers is 31. If each number is multiplied by 2 and then 4 is added, what is the new average?

A. 68

B. 66

C. 64

D. 62

Answer: Option B

New average = (31×2)+4 =62+4=66.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 12 numbers 870. If average of 8 is 865, average of remaining 4?

A. 882

B. 878

C. 880

D. 875

Correct Answer: Option C

Explanation:
Sum12=10440. Sum8=6920. Remaining=3520. Average=880.

This question belongs to: Maths Average

Question #2 Report Error

Average of 20,40,60,80,100,120 is

A. 70

B. 60

C. 75

D. 80

Correct Answer: Option A

Explanation:
420/6=70.

This question belongs to: Maths Average

Question #3 Report Error

The average of 9 consecutive integers is 15. What is the largest integer?

A. 20

B. 18

C. 17

D. 19

Correct Answer: Option D

Explanation:
Middle (5th) is 15. Largest =15 +4 =19.

This question belongs to: Maths Average