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In how many ways can 7 people line if A needs to be first or last and B needs to be in the middle

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5 votes

Answer:

Assuming person A and person B are part of the 7 people, there are 10 ways the 7 people can line up if A needs to be first or last and B needs to be in the middle.

Explanation:

There are 2 places for A (first, last) and 5 places for B (anywhere but first or last). 2 x 5 = 10.

User DonJuwe
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