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 September 12th, 2008, 08:05 AM #1 Newbie   Joined: Sep 2008 Posts: 6 Thanks: 0 Simple Probability Question I need help on this, I know it's simple but I can't find a decent example to help me solve it. There are 2 Senators for each of the 50 states. If 10 Senators are selected at random, what is the probability they are all from different states. Thanks.
September 12th, 2008, 01:06 PM   #2
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Re: Simple Probability Question

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 Originally Posted by slade8200 I need help on this, I know it's simple but I can't find a decent example to help me solve it. There are 2 Senators for each of the 50 states. If 10 Senators are selected at random, what is the probability they are all from different states. Thanks.
Start with 1 senator. Prob no. 2 is from diff state is 98/99, prob no. 3 diff from first two is 96/98, prob no. 4 is diff from first three is 94/97, etc. Multiply all these together to get what you want.

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