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I have \(5\) different pullover shirts and \(4\) different button-down shirts. In how many ways can I choose shirts for the next \(9\) days if I insist on wearing pullover shirts two days in a row at least once? Assume that I wear one shirt each day, and every shirt gets worn once.

 Oct 6, 2018
 #1
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This has already been asked and answered. If you have a problem with the answer than write that on the original post!

 

It is rude to repost like this !

 Oct 7, 2018

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