12 students of class IX took part in GK quiz. If the number of boys is 4 more than the number of girls. Find the number of boys and girls took part in the quiz ?
A) 7, 5
B) 9, 3
C) 8, 4
D) 6, 6
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c) 8,4
let number of girls be x
then boys is x+4
x+x+4=12
2x+4=12
2x=12-4
2x=8
x=8÷2
x=4
girls = x = 4
boys = x+4 = 4+4 = 8
let number of girls be x
then boys is x+4
x+x+4=12
2x+4=12
2x=12-4
2x=8
x=8÷2
x=4
girls = x = 4
boys = x+4 = 4+4 = 8
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