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October 30, 2014

Homework Help: math

Posted by Carol on Sunday, October 24, 2010 at 6:01pm.

I'm in 5th grade pls. help.

Amanda has a collection of X, Y and Z. Every X is a Y. One half the Z's are Y's. There are 3 times as many Y's as X's. Amanda has 50 Z's and 40 X's. No Z is an X. How many Y's does Amanda have that are neither X's nor Z's?

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