10 students took part in a maths quiz.if the number of girls is 4 more than the number of boys,find the number of boys and girls who took part in the quiz.
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let the no. of boys be x and no. of girls be y.
according to the given,
x+y=10-1
y=x+4-2
substitute 2 in 1
x+x+4=10
2x+4=10
2x=10-4
2x=6
x=3
substitute x=3 in eqn 2
y=3+4
y=7
no.of boys=3
no. of girls=7.
according to the given,
x+y=10-1
y=x+4-2
substitute 2 in 1
x+x+4=10
2x+4=10
2x=10-4
2x=6
x=3
substitute x=3 in eqn 2
y=3+4
y=7
no.of boys=3
no. of girls=7.
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