February 22, 2017

Homework Help: Probability

Posted by Anonymous on Saturday, March 1, 2008 at 10:04pm.

Two fair coins are flipped simultaneously. This is done repeatedly until at least one of the coins comes up heads, at which point the process stops. What is the probability that both coins come up heads?

I think it would be 1/2 but the answer is 1/3 and I have no idea where you would get that answer.

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