Question

The ratio of the number of boys to the number of girls in a school of 560 pupils is 5:3.If 10 new boys are admitted ,fund how many new girls may be admitted so that the ratio of the number of boys to the number of girls may change to 3:2.

Answer 1

Let the no. of boys be 5x

            No. of girls be 3x

5x + 3x = 560

8x = 560

x = 70

Therefore, no. of boys = 350 boys

No. of girls = 210 girls

After admission, no. of boys = 360

Let the no. of boys be 3x

No. Of girls be 2x

3x = 360

x = 120 boys

Therefore, no. of girls have to be 240 (120X2)

No. Of girls to be added = 30 (240-210) girls

Answer 2

the ans. will be 70
if it is correct then add it to brainly