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? Answers
A) 9	B) 71	C) 85	D) 92	E) 90
Age of the 15th student = 19*15 - (14*5+16*9) = 285-214= 
<gadget id="calculator">285-214</gadget>
<output>71</output>
71 years   Answer is 71
<result>B</result>
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?