The average age of father and son is 30. If father is 45, son's age? MCQ with Answer and Explanation

The average age of father and son is 30. If father is 45, son's age?

A. 10

B. 25

C. 15

D. 20

Answer: Option C

Sum =60. Son=60-45=15.

This question belongs to: Maths Average

No comments yet. Be the first to start the discussion!

Question #1 Report Error

The average of 20,40,60,80,100 is

A. 60

B. 55

C. 70

D. 50

Correct Answer: Option A

Explanation:
300/5=60.

This question belongs to: Maths Average

Question #2 Report Error

The average of 9 numbers is 35. If average of first 4 is 32, average of last 6 is 37, the 4th number?

A. 35

B. 34

C. 36

D. 33

Correct Answer: Option D

Explanation:
Sum9=315. Sum1-4=128. Sum4-9=222. 4th=128+222-315=35.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 940. If average of 6 is 935, average of remaining 3?

A. 955

B. 950

C. 948

D. 945

Correct Answer: Option B

Explanation:
Sum9=8460. Sum6=5610. Remaining=2850. Average=950.

This question belongs to: Maths Average