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April 20, 2014

Homework Help: maths P5

Posted by jiejie on Saturday, September 10, 2011 at 4:19am.

There were 335 children in a hall. 1/4 of the girls and 2/5 of the boys are swimmers. There are 110 swimmers in all. How many boys are there in the hall? (need non-algebra or model to solve, pls)

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