Question

the ratio of number of girls to the number of boys in a class is 7:2 if there are 27 boys in the class then find the number of girls

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Answer 1

Step-by-step explanation:

7:27::2:x

x= 54/7

number of girls = 54/7

if number of student is 27

let the number of boys be 7x and girls be 2x

then, number of student= 7x + 2x

= 9x

According to question,

9x = 27

x= 27/9

= 3

hence,

nu of boys = 7 * 3

= 21

nu of girls = 2 * 3

= 6

Answer 2

Answer:

27/x=7/2

54/7 are the no. of girls in the class