Answers

2014-02-24T21:57:47+08:00
In a class with 29 children 20 of them has a dog and 15 has a cat. so this means

20+15=35, then 35-29=6 so there are 6 children with cats and dogs. 
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2014-02-24T22:25:33+08:00
6 children have both cats and dogs....

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