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    Counting techniques

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    Program Selection. A meeting is to be addressed by 5 speakers, A, B, C, D, and E. In how many ways can the speakers be ordered if B must come first? Please show which formula is used.

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    Solution Preview

    There are n! ways to order n items.

    In this problem, we know that ...

    Solution Summary

    The solution provides an example of working with a counting problem.