In a school, the ratio of boys to girls is 3 to 7. if there are 150 boys and girls in the school, how many boys are there?
In a school, the ratio of boys to girls is 3 to 7. if there are 150 boys and girls in the school, how many boys are there? Correct Answer 45
let, the number of boys is 3x and the number of girls is 7x According to the question, 3x + 7x = 150 or, 10x = 150 or, x = 15 so, the number of boys is (3*15) = 45 ans: 45