The average age of M boys is ‘b’ years and of ‘n’ girls ‘c’ years. The average age of all together is?
A. years
B. years
C. years
D. years
Answer:C
The average age of M boys is ‘b’ years and of ‘n’ girls ‘c’ years. The average age of all together is?
A. years B. years C. years D. years