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# How many ways can Otto pick 3 people for his foursome out of

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Director
Joined: 14 Oct 2003
Posts: 588
Location: On Vacation at My Crawford, Texas Ranch
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Kudos [?]: 10 [0], given: 0

How many ways can Otto pick 3 people for his foursome out of [#permalink]  02 Jan 2004, 10:18
How many ways can Otto pick 3 people for his foursome out of a pool of 30 friends?

1) 128
2) 678
3) 789
4) 4060
5) 8320

edited choice 4 (oops!)

Last edited by Titleist on 02 Jan 2004, 11:38, edited 2 times in total.
Senior Manager
Joined: 05 May 2003
Posts: 426
Location: Aus
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Kudos [?]: 5 [0], given: 0

I am assuming that 3 people out of 30. Is that right ? But the answer I am getting is not listed in your choice.
Director
Joined: 14 Oct 2003
Posts: 588
Location: On Vacation at My Crawford, Texas Ranch
Followers: 1

Kudos [?]: 10 [0], given: 0

Geethu wrote:
I am assuming that 3 people out of 30. Is that right ? But the answer I am getting is not listed in your choice.

slight error - thanks geethu!
Senior Manager
Joined: 05 May 2003
Posts: 426
Location: Aus
Followers: 2

Kudos [?]: 5 [0], given: 0

assuming 4 as 4060.
Director
Joined: 14 Oct 2003
Posts: 588
Location: On Vacation at My Crawford, Texas Ranch
Followers: 1

Kudos [?]: 10 [0], given: 0

Yes - right again Geethu!

Director
Joined: 28 Oct 2003
Posts: 503
Location: 55405
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Kudos [?]: 11 [0], given: 0

30 choose 3.

I hope I won't have to bang out that kind of math on the exam...

Did you know if you type (without the quotes) "30 choose 3" into google, that it solves the problem for you?

Neat.
Director
Joined: 14 Oct 2003
Posts: 588
Location: On Vacation at My Crawford, Texas Ranch
Followers: 1

Kudos [?]: 10 [0], given: 0

Wasn't expecting you guys to solve the problem - but who am I kidding - you guys are the combinatorics aces on this board.

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