19-03-2017
Mathematics

contestada

HELP PLEASE
there are 30 students in a class
the ratio of girls to boys is 2:3
work out the Number of boys in the class
PLEASE EXPLAIN HOW

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daniella1742 daniella1742

19-03-2017

So you know there are 30 students. Your ratio is 2:3. You add them together that is five. 30 divided by five is six.

6x2= 12 girls

6x3= 18 boys
18+12= 30
This shows there are 18 boys

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