Question

In a school ,the ratio of girls to boys 3:7. 25% of the girls and 1/5 of the boys are part of the sports club . In total what percentage of the school pupils are part of a sports club

Answer 1

LCM of 3, 4, and 5 = 60

girls:boys = 3:7 = 60:140

(1/4)(60) = 15

(1/5)(140) = 28

(15 + 28)/(60 + 140) = 43/200 = 21.5%