Question

The average age of 5 boys is 19 years. If the age of two boys is 18 years and 17 years.
Find the average age of remainting boys.​

Answer 1

Answer:

11Q:

The average age of 80 boys in a class is 15. The average age of group of 15 boys in the class is 16 and the average of another 25 boys in the class is 14. What is the average age of the remaining boys in the class ?

A) 12.24 yrs

B) 13.25 yrs

C) 16 yrs

D) 15.25 yrs

Answer: D) 15.25 yrs

Explanation:

Total ages of 80 boys = 15 x 80 = 1200 yrs.

Total age of 16 boys = 15 x 16 = 240 yrs

Total age of 25 boys = 14 x 25 = 350 yrs.

Average age of remaining boys = 1200 - (240+350) / 80 - (25+15) = 610/41 = 15.25 yrs.