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3 years ago

6

I have $5$ different mathematics textbooks and $4$ different psychology textbooks. In how many ways can I place the $9$ textbook

s 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?

1 answer:

leonid [27]3 years ago

6 0

Answer:

What

Step-by-step explanation:

You can’t have more than 2 combinations with £9

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