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March 26, 2017

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You and four friends are going to a movie. In how many different orders can you pick your friends up?

  • pre algebra - ,

    There are 4 friends - 4 choices for the first friend to be picked up.

    For every choice of the first picked up, there are 3 friends left - 3 choices for the second friend to be picked up.

    Following the pattern, 2 choices for the third friend, 1 choice for the fourth.

    4*3*2*1 = 24

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