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Math Forum » Discussions » Math Topics » alt.algebra.help.independent

Topic: probability
Replies: 3   Last Post: Jul 21, 2008 7:42 PM

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Posts: 4
Registered: 6/25/08
Posted: Jun 26, 2008 7:35 AM
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If there are 2 choices (doors) and 20 people choose either door 1 or door 2. What is the probability that 2 people will choose door 1 and 18 people will choose door 2. I have struggled with this for sometime now. I thought it would be simply (1/2)^20 but I am not so sure. Any Help

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