Question

The ratio of boys to girls in a class is 6:5. There are 18 boys. How many girls are there?

Answer 1

6:5

18:x

cross multiplication

6x=5×18

x=5×18/6

x=5×3

x=15

so no of girls is equal to 15

Answer 2

Answer:

Ratio of boys =6

Ratio of girls =5

NO. BOYS =18

NO. OF GIRLS= X

=) 6x =5×18

=)X=5 ×18/6..{6×3= 18 .so we cut 18 from 6 by using 3}

=) X = 5 × 3

=) X= 15

NO. OF GIRLS IS 15..........

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