The average age of 19 persons in a office is 15 years. Out of these, the average age of 5 of them is 14 years and that of the other 9 persons is 16 years. The age of the 15th person is?  Choose the correct choice from the following answers:	A) 9	B) 71	C) 85	D) 92	E) 90

Rationale: "age of the 15 th student = 19 * 15 - ( 14 * 5 + 16 * 9 ) = 285 - 214 = 71 years answer is b"
Answer: B