The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 13 years and that of the other 9 students is 16 years, The age of the 15th student is	Choose the correct choice from the following:
A) 11	B) 16	C) 13	D) 14	E) 15

Rationale: explanation : age of the 15 th student = [ 15 * 15 - ( 13 * 5 + 16 * 9 ) ] = 16 years . answer : b
Answer: B