Question

The ratio of number of girl to the number of boys in a class is 7:5. If there are 15 boys in the class,then the number of girls in the class is
(a)14

(b)21

(c)28

(d)36​

Answer 1

no .of girls7 and no.of boys 5.if there 15 boys

Step-by-step explanation:

7-5=2,1-15=14

Answer 2

Question:-

The ratio of number of girl to the number of boys in a class is 7:5. If there are 15 boys in the class,then the number of girls in the class is:

(a)14

(b)21

(c)28

(d)36

Answer:-

Option (b) 21.

How to get it:-

Let the number of girls be x

$=>Girls : Boys = 7 : 5$

$=>x : 15 = 7 : 5$

$= > \frac{x}{15} \: = \: \frac{7}{5}$

$= > x \: = \: \frac{7 \times 15}{5}$

$= > x \: = \: \frac{105}{5}$

$= > x \: = 21$

I hope it helps you...........☺️