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anonymous

  • 4 years ago

Scott has eight CDs, and he picks two to take to work each day. How many different ways can Scott choose two CDs? a.)56 B.)28 C.)20,160 D.)112

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  1. anonymous
    • 4 years ago
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    \[\frac{8\times 7}{2}\]

  2. anonymous
    • 4 years ago
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    \( {8 \choose 2} =28\) so, B is correct.

  3. anonymous
    • 4 years ago
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    8 choices for first one, then 7 for second one, and since order doesn't matter you divide by 2 because there is no difference between picking first slayer and then britney spears, or first britney spears and then slayer

  4. perl
    • 4 years ago
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    pop culture reference :O

  5. perl
    • 4 years ago
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    you divide by 2 because you have overcounted twice as much,

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