10 students of class X took part in a Mathematics 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. [3 MARKS]
Concept : 1 Mark
Application : 1 Mark
Calculation : 1 Mark
Let the number of boys be x & girls be y.
According to the given condition,
Solving (i) & (ii) we get ,
x=10−y [From (i)]
Substituting value of x in (ii)
∴ The number of boys is 3 and number of girls is 7.