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how many different ways can 7 out of 18 people be picked to fit into a van

  • math -

    Once we have chosen our 7 people, which would be
    C(18,7) or 31824 ways,
    each of those groups can be arranged in the van in
    7! ways
    But I don't think you asked for the last part, so just
    31824 ways.

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