Two Plus Two Older Archives simple probability question
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#1
10-27-2004, 10:24 AM
 theBruiser500 Senior Member Join Date: Nov 2003 Posts: 578
simple probability question

3 events, they odds of them happening are, 1/3 1/3 2/5

what are the odds that 2/3 of those events will occur, it can be any 2 out of those 3. thanks.
#2
10-27-2004, 10:44 AM
 TomCollins Senior Member Join Date: Jul 2003 Location: Austin, TX Posts: 172
Re: simple probability question

As long as they are not related:

First 2:
1/3*1/3*3/5= 3/45
First and Last:
1/3*2/3*2/5 = 4/45
Last 2:
2/3*1/3*2/5= 4/45

So 11/45 that exactly 2/3 will occur.

If you include the case when all 3 occurs,
1/3*1/3*2/5= 2/45, total probability is 13/45.
#3
11-07-2004, 03:57 AM
 theBruiser500 Senior Member Join Date: Nov 2003 Posts: 578
Re: simple probability question

thanks

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