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28-07-2015
Mathematics

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in a family of cats,there are 2 uncool cats for every 3 coolcats. if these cats have 120 paws together,how many cool cats are there in the family?

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28-07-2015

One cat has four paws, so there are 120/4=30 cats. If a "set" of cats is two uncool cats and three cool cats, there are five cats in a set, so there are 30/5=6 sets. Since each of the six sets contains three cool cats, there are 18 cool cats in the family.

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