Question

( the chap is commercial mathematics ) In a school 35% students r girls andthere r 910 boys . Find no. of girls and total students in school?

Answer 1

let the total students =x
girls =35%
boys=65%
65% of x =910
(65/100)*x=910
x=(910*100)/65
x=1400

total students =x=1400
number of girls = x- number of boys
=1400 -910
=490

Answer 2

Let the total no. of students be 'x'
Then the no. of girls-35x/100=7x/20
no. of boys-910
According to question:
910+7x/20=X
18200+7x ÷20=X
18200+7x=20x
18200=20x-7x
18200=13x
X=18200/13=1400
The total no. of students are 1400 and total no. of girls are 490.
Hope this helps you...
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