Subject: mathqa
Question: 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 15 th student is ?
Option: 
A: 17 years
B: 11 years
C: 12 years
D: 67 years
Answer: B