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I have  different mathematics textbooks and  different psychology textbooks. In how many ways can I place the  textbooks on a bookshelf, in a row, if there must be a psychology textbook exactly in the middle, and there must be a mathematics textbook at each end?

 Apr 2, 2022
 #1
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There are 5!*3!/2 = 360 ways of placing the textbooks.

 Apr 2, 2022
 #2
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That was wrong

 Apr 2, 2022

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