The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?

A. 15 years
B. 17 years
C. 18 years
D. 19 years

Explanation:

Sum of the ages of 14 students

= (16 * 35) – (14 * 21) = 560 – 294 = 266
Required average = (266/14) = 19 years