Question

If 55% of the students in a school are boys and number of girls is 900. Find the number of boys.

Answer 1

Answer: 1100 boys

Explanation:

45% students are girls

45% girls in number = 900

1% be = 900x45= 20

55% students are boys

55% boys in number= 55x20= 1100 boys

Answer 2

1100

Explanation:

The whole school population is represented by 100%, thus

number of girls = 100% - 55 = 45% of population

divide 900 by 45 to find 1% then multiply by 55 to find number of boys

number of boys =
`(900)/(45)` × 55 = 1100