Question

IN a school the ratio of boys and girls 4:5when 100girls leave school the ratio becoms 6:7 how many boys are there in the school​

Answer 1

Step-by-step explanation:

How many boys are there in the school?

:

let x = the multiplier

then

4x = original number of boys

and

5x = original number of girls

:

Cross multiply

7(4x) = 6(5x-100)

28x = 30x - 600

600 = 30x - 28x

600 = 2x

x = 600/2

x = 300 is the multiplier

then

4(300) = 1200 boys

Answer 2

Answer:1200 boys

Step-by-step explanation:

Explained In The Image

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