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You need to hang seven pictures in a straight line, in how many ways can this be done?
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You need to hang seven pictures in a straight line, in how many ways can this be done?

User ABLX
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4 votes
This is simple. It is 7 factorial, or 7!. This just means 7*6*5*4*3*2*1, which is 5040.
User Crazylammer
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