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Mathematics

10th -

12thgrade

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Permutations & Combinations

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10 questions

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  • 1. Multiple Choice
    1 minute
    1 pt
    A disc jockey has to choose three songs for the last few minutes of his evening show.  If there are nine songs that he feels are appropriate for that time slot, then how many ways can he choose and arrange to play three of those nine songs?
    84
    504
    9!
    3!
  • 2. Multiple Choice
    1 minute
    1 pt
    How many 2-digit numbers can you make using the digits 1, 2, 3, & 4 without repeating the digits?
    90
    100
    12
    24
  • 3. Multiple Choice
    1 minute
    1 pt
    Robin has five different pairs of shoes that match with 6 different pairs of socks.  How many shoes-and-socks combinations can she make if she selects one pair of shoes and one pair of socks?
    1
    30
    5!
    6!
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