Question

in a school,4/5 of the students are boys & the no. of girls are 100. find the no. of boys

Answer 1

Since 4/5 are boys, the number of girl will be 1/5.

Also, number of girls is given to be 100.

Let the total number of students be a.

So,

1a/5= 100

a= 500

Now, number of students is 500, number of girls is 100,

so number of boys= total number of students-number of girls

= 500-100

=400

So your answer is 400.