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? Choose one:
A) 15  B) 16  C) 17  D) Insufficient Data  E) 15.5
We do not have the number of boys and girls. Hence we cannot find out the answer.   Answer is 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?