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Math Help - Permutation or Combination?

  1. #1
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    Permutation or Combination?

    A varsity volleyball team needs nine members. Of these nine members, at least fivev must be seniors. How many of the possible groups of juniors and seniors have at least five seniors?

    My reasoning:
    A combination must be used because order doesn't matter. 9 Cr 4=126

    Yes or no?
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  2. #2
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    Quote Originally Posted by puzzledwithpolynomials View Post
    A varsity volleyball team needs nine members. Of these nine members, at least fivev must be seniors. How many of the possible groups of juniors and seniors have at least five seniors?

    My reasoning:
    A combination must be used because order doesn't matter. 9 Cr 4=126

    Yes or no?
    Yes
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by puzzledwithpolynomials View Post
    A varsity volleyball team needs nine members. Of these nine members, at least fivev must be seniors. How many of the possible groups of juniors and seniors have at least five seniors?

    My reasoning:
    A combination must be used because order doesn't matter. 9 Cr 4=126

    Yes or no?
    note that it says "at least" 5 seniors. meaning the team can have 5 or 6 or 7 or 8 or 9 seniors. were we told from what size groups of people we are choosing from? how many seniors? how many juniors?
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