Question

there are three sections A, B, C in a school of class XIi. the ratio of the students A:B is 3:5 and that in B:C is 4:7.if the total number of students in the class is 134.how many students are in section A? ​

Answer 1

As given,

A:B = 3:5

B:C = 4:7

Then A:B:C will be 12:20:35

So, 12x + 20x + 35x = 134

= 67x = 134

= x = 134/67

= x = 2

Then

A = 12x

A = 12 × 2

A = 24