Question

A school has 630 students. The ratio of the number of boys to the number and girls is 4:3. If 40 new boys are admitted, find how many new girls must be admitted so that the ratio of the number of boys to the number of girls does not change.

Answer 1

Answer:

30girls and 40 boys all the best for your exam

Step-by-step explanation:

by elemanition method all the best

Answer 2

Answer:

The total number of students in school=630

let the ratio be=x

number of boys=3x

number of girls=2x

firstly we have to find the value of x

2x+3x=630

5x=630

x=630/5

x=126

Now we have to put the value of x

3x=3×126=378

2x=2×126=252

the new admitted student is 90

now the ratio of total admitted student

boys=7x

girls=5x

now we have to find the number of students

7x+5x=720

12x=720

x=720/12

x=60

now we have to put the value of x

boys=7x=7×60=420

Before the admission the number of boys=378

After the admission the number of boys=420

we have to find the newly admitted boys

420-378=42

hence the newly admitted boys is 42

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