Question

if 70 precentage of stuedent in a school are boys and no. of girls is 540 find no. of boys in school

Answer 1

if 70% of students are boys
then it means that 540 the no. of girls is the 30% of the total strength
therefore 30% of x= 540
which means x = 540×100/30
x( total strength) = 1800
therefore 70% of 1800 are boys
that are 1360

Answer 2

Let the number of total students be x.
Then the number of girls will be 30% of x.
= 30/100 × x = 540
= x = 540×100/30
= x = 160 × 10
= x = 1600
The number of boys will be 1600 - 540 = 1060.
Therefore, the number of boys in the school is 1060.
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