The average age of M boys is b years and of n girls c years. The average age of all together is_________?

A. (mb + nc)/ (m n) years

B. (mb nc)/ (m n) years

C. (mb + nc)/ (m + n) years

D. (mb nc)/ (m + n) years

Be the first to comment if anything wrong with this mcq
Your comment successfully submitted!
It will automatically posted after review and approval by our staff member.