anonymous
  • anonymous
they are 22 students in a faternity.in how many ways can a communitue of 9 students be selected?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
M
  • M
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
watchmath
  • watchmath
For all your selection problem you just need combination. So here you nee 22 choose 9. You can calculate the numerical value by yourself.
M
  • M
use calculator :P

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anonymous
  • anonymous
so 22/9?
anonymous
  • anonymous
22 choose 9 = 22!/9!13! = 497420
M
  • M
no it's 22!/(22-13)!13!
anonymous
  • anonymous
but if u minues 22 from 13 is 9 too
M
  • M
22!/9!13! = 497420 is right answer
M
  • M
but wanted to show how daniel got 9!
watchmath
  • watchmath
@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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