Question

In a class of 42 students, the girls and boys are in the ratio of 3:4 . Its linear equation is _ and the number of girls is_.​

Answer 1

Step-by-step explanation:

let girls be = 3x

let boys be =4x

linear equation:

3x+4x=42

solve

7x= 42

x=6

no of girls = 3*6=18

Answer 2

Step-by-step explanation:

let the number of girls and the number of boys be 3x and 4x respectively.

A / Q

3x + 4x = 42

=> 7x = 42

=> x = 42 /7

=> x = 6

Number of girls = 3x

= 3×6

= 18

Number of boys = 4x

= 4×6

= 24

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