math

The planning committee at school has 11 members. Exactly five of these members are teachers. A four-person subcommittee with at least one member who is not a teacher must be formed from the members of the planning committee. How many distinct subcommittees are possible?

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  1. so you have 5 teachers and 6 non-teachers
    the cases you DON'T want is the case where all 4 that are selected are teachers
    number of selections with no restrictions = C(11,4)
    number of selections with all teachers = C(5,4)

    so number of selections as stated = ....

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    Reiny
  2. so?

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  3. So the answer is 325

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  4. its not gud 2 give answers w/out explaining

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