The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. Tee age of the 15th student is:
Options:
A . 11 years
B . 14 years
C . 15 years
D . 15 2/7 yeras
Answer: Option A
Age of the 15th student=[15 * 15 - (14 * 5 + 16 * 9)] = (225 - 214) = 11 years.
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