11
Q:
A) 12.24 yrs | B) 13.25 yrs |
C) 16 yrs | D) 15.25 yrs |
Answer: D) 15.25 yrs
Explanation:
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.