Question

Ratio of boys and girl is 4:5, when 100 girl left, the ratio becomes 6:7, find number of boys

1200

600

800

None of these​

Answer 1

Answer:

1200 is the no of boys

Step-by-step explanation:

Given 4:5 is the ratio of boys and girls.

hence 4a ,5a is the total number of boys and girls.

if 100 girls left ,then the ratio of boys and girls is 6:7

therefore, 4a/5a-100=6/7

28a= 30a- 600

a= 300

hence,no of boys= 4a=4×300=1200

Answer 2

Answer:

800 no. boy ..... (accordance to me )