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Attention Statistics Experts: Permutation or Combination?

 
helpastudent
User ID: 1165367
United States
11/18/2010 10:54 AM
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Attention Statistics Experts: Permutation or Combination?
nPr or nCr?

In the Us Senate, there are 21 members on the Committee on Banking, Housing, and Urban Affairs. Nine of those 21 members are selcted to be on the Subcommittee on Economic Plicy. How many different committee structures are possible for this Subcommittee?

is it 9!. or

Also: In how many ways can the top 2 horses finish in a 10 horse race?

Is it 2!/10!
Thoughtful_Hobbit

User ID: 1085489
United States
11/18/2010 11:13 AM
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Re: Attention Statistics Experts: Permutation or Combination?
nPr or nCr?

In the Us Senate, there are 21 members on the Committee on Banking, Housing, and Urban Affairs. Nine of those 21 members are selcted to be on the Subcommittee on Economic Plicy. How many different committee structures are possible for this Subcommittee?

is it 9!. or

Also: In how many ways can the top 2 horses finish in a 10 horse race?

Is it 2!/10!
 Quoting: helpastudent 1165367


both
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