Average age of class of 40 is 15. If teacher 40 included, new average? MCQ with Answer and Explanation

Average age of class of 40 is 15. If teacher 40 included, new average?

A. 17

B. 16

C. 15.6

D. 15.5

Answer: Option B

Total=600. New total=640. /41≈15.61 approx 16.

This question belongs to: Maths Average

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

Question #1 Report Error

If the average of 7 numbers is 35 and the average of first 4 is 32, average of last 4 is 38. What is the 4th number?

A. 35

B. 32

C. 28

D. 30

Correct Answer: Option A

Explanation:
Sum of 7 = 7×35=245. Sum first 4=4×32=128. Sum last 4=4×38=152. 4th number = 128 + 152 - 245 = 35.

This question belongs to: Maths Average

Question #2 Report Error

Average of 18,36,54,72 is

A. 40

B. 50

C. 45

D. 42

Correct Answer: Option C

Explanation:
180/4=45.

This question belongs to: Maths Average

Question #3 Report Error

The average of 20,25,30,35,40 is

A. 32

B. 28

C. 30

D. 31

Correct Answer: Option C

Explanation:
Sum=150. Average=30.

This question belongs to: Maths Average