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Question

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]


Solution

Concept : 1 Mark
Application : 1 Mark
Calculation : 1 Mark

Let the number of boys be x & girls be y.

According to the given condition,

x+y=10(i)

yx=4(ii)

Solving  (i) & (ii) we get ,

x=10y    [From (i)]

Substituting value of x in (ii)

yx=4

y10+y=4

y=7

Now, x=10y

x=107x=3

y=7,x=3

The number of boys is 3 and number of girls is 7.


Mathematics

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