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21-01-2015
Mathematics

Answered

60% of the class are girls.there are 18 girls
- how many students are there in the class?
- how many boys are there?

Answer :

21-01-2015

So if 18=3/5 which is 60% then we find x times .6= 18 so x=30 and in a 30 person class, 18 are girls, 12 must be boys

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