The average age of 15 students of a class is 15 years. Out of these, the average age of 6 students is 14 years and that of the other 8 students is 16 years. The age of the 15th student is Pick
A) 9 years  B) 13 years  C) 14 years  D) 21 years  E) 25 years
Solution   Age of the 15th student	=[15x15-(14x6+16x8)]   = (225 - 212)= 
<gadget id="calculator">(225 - 212)</gadget>
<output>13</output>
13 years.   Answer 13 years
<result>B</result>
The average age of 15 students of a class is 15 years. Out of these, the average age of 6 students is 14 years and that of the other 8 students is 16 years. The age of the 15th student is