The average age of 15 students of a class is 15 years. Out of these, the average age of 3 students is 14 years and that of the other 11 students is 16 years. The age of the 15th student is Choose the correct choice from the following options:
A) 9 years B) 11 years C) 14 years D) 7 years E) 25 years
Solution   Age of the 15th student	=[15x15-(14x3+16x11)]   = (225 - 218)= 
<gadget id="calculator">(225 - 218)</gadget>
<output>7</output>
7 years.   Answer 7 years
<result>D</result>
The average age of 15 students of a class is 15 years. Out of these, the average age of 3 students is 14 years and that of the other 11 students is 16 years. The age of the 15th student is