If average of 9, 12, 15, x is 13, x is MCQ with Answer and Explanation

If average of 9, 12, 15, x is 13, x is

A. 14

B. 16

C. 15

D. 17

Answer: Option B

Sum=52. 9+12+15+x=52. x=16.

This question belongs to: Maths Average

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

Question #1 Report Error

Average speed for round trip at 40 km/h going and 60 km/h returning?

A. 55 km/h

B. 48 km/h

C. 45 km/h

D. 50 km/h

Correct Answer: Option B

Explanation:
2*40*60/(40+60)=48 km/h.

This question belongs to: Maths Average

Question #2 Report Error

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. 64

B. 68

C. 62

D. 66

Correct Answer: Option D

Explanation:
New average = (31×2)+4 =62+4=66.

This question belongs to: Maths Average

Question #3 Report Error

Average of 20 numbers 25. If each increased by 5, new average?

A. 30

B. 32

C. 25

D. 28

Correct Answer: Option A

Explanation:
New average=30.

This question belongs to: Maths Average