There are 1650 students in a college. The difference between the number of boys and girls in the college is 400. What is the percentage of girls in the college ?
Let B be the no. of boys and G be the no. of girls than B+G=1650 ______ (1)
B−G=400 ______ (2) (given)
∴(1)+(2)⇒2B=2050⇒B=1025
Substituting B=1025 in (1) ⇒G=1650−1025
G=625
∴ % of girls = No.ofgirlsTotalno.ofstudents
625×1001650=38%(approx)