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October 7th, 2007, 12:52 PM  #1 
Newbie Joined: Oct 2007 Posts: 1 Thanks: 0  can anyone answer this?
I'm wondering if maybe the answers in my textbook are incorrect. What are the answers to these two apparently easy probability problems. Any help would be greatly appreciated. Thanks! 1. A fair coin is flipped at random until the first head is observed. Let Ax equal the event that exactly x flips are required for x = 1,2,3,4,.... Estimate the value of P(Ax). 2. A fair coin is flipped at random until heads is observed on two successive flips. Let By equal the event that exactly y flips are required y = 2,3,4,.... Estimate the value of P(By). 

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