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anonymous

  • one year ago

9 students volunteer for a committee. How many different 7-person committees can be chosen?

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  1. anonymous
    • one year ago
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    Any options?

  2. anonymous
    • one year ago
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    A.181,440 B.36 C.362,880 D.1

  3. wolf1728
    • one year ago
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    You want to choose 7 people from a set of 9

  4. anonymous
    • one year ago
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    9 C 7

  5. anonymous
    • one year ago
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    @Nasa7

  6. anonymous
    • one year ago
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    You use the formula of nCr. n is the total number you are choosing from. r is the number you want to choose.

  7. wolf1728
    • one year ago
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    The formula is n! / (r! * (n-r)!) where n is 9 and r is 7

  8. anonymous
    • one year ago
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    yep @wolf1728 !

  9. anonymous
    • one year ago
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    9!/(7!*(9-7)!)

  10. wolf1728
    • one year ago
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    9! / (7! * 2!) which equals 9 * 8 / 2 = 72 / 2 = 36 which is B

  11. anonymous
    • one year ago
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    Thanks a lot the problem was that i needed a calculator @wolf1728

  12. wolf1728
    • one year ago
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    Actually, if you cancel the factors correctly you don't need a calculator

  13. anonymous
    • one year ago
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    thanks anyway , i have not took math and i forgot all of this , this is for a different class (CCP) @wolf1728

  14. anonymous
    • one year ago
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    Sorry I just saw your tag back I see @wolf1728 is helping you now :D

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