Question

In a classroom, the ratio of the sum of the weights of all male students to that of

female students is 5:3. If the sum of the weights of all female students is 870
kilograms and the mean of the weights of male students is greater than 80
kilogram, What is the maximum number of male students in this classroom?

Answer 1

Explanation:

First find the total weight of the male students

5/3 = x / 870 cross multiply

4350 = 3x

x = total boys' weight = 1450 kg

if the mean is GREATER THAN 80 then

1450 / n > 80 where n is the number of boys

1450/80 > n

n< 18.125 max number would be 18 boys