In John's School, there are 80boys of age 14 each, 70boys of age 15 each & 50boys of age 13 each and another 60boys of age 12each. The average age of the boys of the school is Choose the correct choice from the following answers
A) 13 B) 13.6 C) 13.8 D) 14.6 E) 15.7
Average age of boys = Sum of the ages of all boys/ Total number of boys   = (80 x14)+(70x15)+(50x13)+(60x12)/(80+70+50+60)   = (1120+1050+650+720)/260   =3540/260 =13.6   13.6
<result>B</result>
In John's School, there are 80boys of age 14 each, 70boys of age 15 each & 50boys of age 13 each and another 60boys of age 12each. The average age of the boys of the school is