Question

in a school , 4/7 of the students are boys . if there are 210 girls , find the number of boys in school.
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Answer 1

Explanation:

Let total no. Of students be x.

Now boys=4x/7

Girls =210

So,total students =girls+boys

x=4x/7+210

X-4x/7=210

3x/7=210

3x=210x7

x=1470/3

x=490

So total no. of students =490

Boys=490-210=280

So, there are 280 boys in the class.