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.
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