# math

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A,B,C, and D are sitting along one side of a table. In how many different orders could the four friends be sitting?

• math -

a b c d
a b d c

a c b d
a c d b

a d b c
a d c b

Well, six ways for each of the four starting letters
6*4 = 24

• math -

By the way
4! = 4*3*2*1 = 24

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