Question

the number ofboy and girls in a class are in the ratio 7:5 four years later the sum of their ages will be 56 years what are their present ages​

Answer 1

Answer:28

STEP BY STEP EXPLAINATION:

Let the number be 5x and 7x.

So,

5x + 4 + 7x + 4 = 56

12x + 8 = 56

12x = 56 - 8

12x = 48

X = 48/12

X = 4

So, 5x = 4 * 5 = 20

7x = 4 * 7 = 28

Hope it helps...!!