Question

in a school 720 are boys and 40% are girls find the total number of student

Answer 1

Let total be x
No. Of boys = x-40/100x
= 100-40/100x
= 60/100x
6/10x
= 3/5x
A/Q
3/5x= 720
X= 720*5/3
X= 1200

Answer 2

If 40% of students are girls then number of boys =( 100 - 40) % = 60 %

But Given that, Boys are 720 in number.

Let the total number of students be x.

60% of x = 720

x = 720 * 100 / 60

x = 12*100 = 1200 .


Total number of students = 1200

Number of girls = 40% of 1200 = 480

Number of boys = 60% of 1200 = 720 .