The average age of boys in a class is 16 years and that of the girls is 15 years. What is the average age for the whole class?	Select the correct option
A) 15  B) 16  C) 15.5  D) Insufficient Data  E) 17
Explanation:   We do not have the number of boys and girls. Hence we cannot find out the answer.   Answer: Option Insufficient Data
<result>D</result>
The average age of boys in a class is 16 years and that of the girls is 15 years. What is the average age for the whole class?