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four fair dice are rolled. what is the probability of having

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SVP
Joined: 03 Feb 2003
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four fair dice are rolled. what is the probability of having [#permalink]  24 Jun 2003, 23:33
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four fair dice are rolled. what is the probability of having at least 2 threes?
SVP
Joined: 03 Feb 2003
Posts: 1607
Followers: 7

Kudos [?]: 85 [0], given: 0

let us wait for other people

Four dice not three ones!
Manager
Joined: 03 Jun 2003
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Location: Uruguay
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Possibilities:

33** 1/6*1/6*5/6*5/6 * 4C2
333* 1/6*1/6*1/6*5/6 * 4C3
3333 1/6*1/6*1/6*1/6 * 4C4

31/6^4
SVP
Joined: 03 Feb 2003
Posts: 1607
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Kudos [?]: 85 [0], given: 0

MBA04 wrote:
Possibilities:

33** 1/6*1/6*5/6*5/6 * 4C2
333* 1/6*1/6*1/6*5/6 * 4C3
3333 1/6*1/6*1/6*1/6 * 4C4

31/6^4

The cases are right; the sum is 171/6^4=0.1319
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Joined: 04 Dec 2002
Posts: 12821
Location: United States (WA)
GMAT 1: 750 Q49 V42
GPA: 3.5
WE: Information Technology (Hospitality and Tourism)
Followers: 2728

Kudos [?]: 13558 [0], given: 3865

Expert's post
SVP
Joined: 03 Feb 2003
Posts: 1607
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Bogdan
now these questions are more appropriate, aren't them?
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