math

Five athletes are chosen to represent their sports at the school pep rally. Two girls and three boys are selected to walk into the gymnasium. If a girl must enter first and the other girl must be the last one to enter, how many different ways can the athletes enter the gym?

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  1. So they must enter in the order
    G B B B G

    number of ways
    = 2 * 3*2*1 * 1
    = 12

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