Question

the number of boys and girl in class are in the ratio 7:5 the number of boys is 8 more than the number of girls . what is the total class strength​

Answer 1

Answer:

As their ratio is given as 7 : 5.

So, the strength of the class will be = number of boys in class + number of girls in class. That is 12x. (7x + 5x)

Now, we know that it is given in the question that the number of boys is 8 more than the number of girls. So, the number of boys should be equal to 7x =7*4 = 28.

5x = 5*4 = 20

Therefore, number of girls = 20

Step-by-step explanation:

7x – 5x = 8

⇒ 2x = 8

On dividing both sides of the above equation by 2, we get,

⇒ x = 4

So, the number of boys should be equal to 7x =7*4 = 28.

Number of girls will be equal to 5x = 5*4 = 20

And the strength of the class will be 12x = 12*4 = 48.

Hope you understood the answer!!