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        riddles >> easy >> easy? probability
        
(Message started by: fatball on Dec 10th, 2007, 10:50am)
Title: easy? probability
Post by fatball on Dec 10th, 2007, 10:50am
In a bag there is a 3 black balls and 2 white balls.

One ball is drawn at random and then replaced.

In three successive draws ,what is the chance that only white balls are drawn
Title: Re: easy? probability
Post by SMQ on Dec 10th, 2007, 11:02am
Because the draws are independent, you can just [hide]multiply probabilities: (2/5)*(2/5)*(2/5) = 8/125[/hide].

--SMQ


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