The average age of 15 students of a class is 15 years. Out of these, the average age of 8 students is 14 years and that of the other 6 students is 16 years. The age of the 15th student is Choose the correct option
A) 9 years	B) 11 years	C) 17 years	D) 21 years	E) 25 years

Rationale: "solution age of the 15 th student = [ 15 x 15 - ( 14 x 8 + 16 x 6 ) ] = ( 225 - 208 ) = 17 years . answer c"
Answer: C