Question

In a class of 50 students, the average age of girls is 12.3 years and that of boys is 12.5 years. If the average age of class is 12.42 years, then the number of boys and girls respectively in the class are:

Answer 1

Answer:

25 boys and 25 girls

Step-by-step explanation:

"the average age of girls is 12.3 yrs and boys is 12.5" ,then with boys=b & girls=g

b+g= 50 ---(i) &

(12.3b+12.5b)/50=12.5 ---(ii)

On solving (i) & (ii), b=25, g=25