Answers

2016-01-14T06:57:32+05:30
7:5 = x+8 : x
7x = 5x + 40
2x = 40
x = 20
therefore boys= 28
total no. of students = 20 + 28
= 48
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2016-01-14T08:04:22+05:30
Given ratio of boys and girls = 7:5
Let no.of boysbe 7x 
no.of girls be 5x
According to the question 
    7x = 5x+8
⇒ 7x -5x = 8
⇒ 2x = 8
⇒ x =8/2
∴ x= 4
∴No.of Boys = 7x = 7(4) = 28
  No.of Girls = 5x = 5(4) = 20
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