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anonymous

  • 5 years ago

they are 22 students in a faternity.in how many ways can a communitue of 9 students be selected?

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  1. M
    • 5 years ago
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    send emailTwitterFacebookMore...Build a widget based on this result » Related Wolfram|Alpha Queries binomial(n, m) example sums for binomial(n,... f(n, k) = f(n, n - k) identities for binomial(n, m) Related Links Binomial coefficients (Wolfram Functions Site) » Binomial Coefficient (MathWorld) » Binomial (in Mathematica) » AboutProductsMobile AppsBusiness SolutionsFor DevelopersResources & ToolsBlogForumParticipateContactFollow: FacebookTwitterRSSSign up for news © 2011 Wolfram Alpha LLC—A Wolfram Research CompanyTermsPrivacyEntity Index [ Infrastructure for this computation provided by Wolfram|Alpha compute partner Dell, Inc.. ] x Copyable plaintext: 497420

  2. watchmath
    • 5 years ago
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    For all your selection problem you just need combination. So here you nee 22 choose 9. You can calculate the numerical value by yourself.

  3. M
    • 5 years ago
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    use calculator :P

  4. anonymous
    • 5 years ago
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    so 22/9?

  5. anonymous
    • 5 years ago
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    22 choose 9 = 22!/9!13! = 497420

  6. M
    • 5 years ago
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    no it's 22!/(22-13)!13!

  7. anonymous
    • 5 years ago
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    but if u minues 22 from 13 is 9 too

  8. M
    • 5 years ago
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    22!/9!13! = 497420 is right answer

  9. M
    • 5 years ago
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    but wanted to show how daniel got 9!

  10. watchmath
    • 5 years ago
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    @helpers: Do you think this is helpful if the student keep asking the same type of problem and you keep answering them?

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