The average age of M boys is ‘b’ years and of ‘n’ girls ‘c’ years. The average age of all together is_________? Arif Khan 6 years ago A. (mb – nc)/ (m + n) years B. (mb + nc)/ (m – n) years C. (mb + nc)/ (m + n) years D. (mb – nc)/ (m – n) years
