Question

the number of boys in a second class is 7 more than the girls of girls total strength of class is 49 find the number of boys and the number of girls

answer and verify your answer​

Answer 1

Step-by-step explanation:

Number of girls = y

Number of boys = 7 + y

Total class strength = 49

So,

$y + 7 + y = 49 \\ 2y + 7 = 49 \\ 2y = 49 - 7 \\ 2y = 42 \\ y = 42 \div 2 \\ y = 21$

y = 21 girls

y + 7 = 28 boys

Number of girls = 21

Number of boys = 28

Verification

Number of girls + Number of boys = Total strength

21 + 28 = 49