Q: In a class, the average age of 45 boys is 10 years and the average of 15 girls is 10 years. what is the average age of the whole class?
Options:
(A) 12 Years
(B) 12.3 Years
(C) 10 Years
(D) 13 Years
(E) 15 Years Let's give some random thoughts before answering.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Total age of 60 students
(45X 10+15 X 10) = 630
Average = 600/60 = 10 Years
Therefore, the answer is (C).