Question

The number of boys and girls in a class are in the ratio 9:5.The number of girls is 12 less than the number of boys. What is the total strength of class?​

Answer 1

Answer:

42

Step-by-step explanation:

ratio - 9:5 =9x,5x

9x-5x=12

4x=12

x=3

boys: 9x= 9*3= 27

girls: 5x= 5*3= 15

total strength=27+15=42

Answer 2

Step-by-step explanation:

means that

boys is x

girls is y

x=y+12 total no is x +y =2x+12

ratio means 9x/5y

no if boys is 9x/14*2(x+6)