Question

There are between 20 and 40 students in a class the ratio of girls to boys is 4:7

Answer 1

what's the Question?

If it is asking the possible no. of total students its

(4:7) × 2 = 8 : 14

in that case total is 8+14 =22

(4:7) × 3 = 12 : 21

in that case total is 12 + 21 = 33

so there's only two possible values for the total no. of students in class ( within the 20 - 40 range )