Question

55% students of a class are girls. If the number of girls is 4 more than that of the boys, what will be the no. of students in that class?

A.40
B.30
C.28
D.42

PLEASE SHOW THE SOLUTION.

Answer 1

A.40
55% of students = girls
100 - 55%
=45% boys
If 50% = half of class
5% = 2 students
10% = 4
20%= 8
30% = 12
40% = 16
50% = 20
so 100% = 40 students

Answer 2

Let, total Students= x
so,  no . girls = 55% of x = 55x/100
and no of boys = x-55x/100 =45x/100
A/q,
       $\frac{55x}{100} = \frac{45x}{100} +4$
or,  $\frac{55x}{100} - \frac{45x}{100} =4$
or, $\frac{10x}{100} =4$
or, $10x =400$
or, $x = 40$
therefore total no. of student in class = 40
Your Answer will be A.