(adsbygoogle = window.adsbygoogle || []).push({}); Expected Value -- Please Help

Hello,

I have this question that is bugging me to death. Ok here it is:

If a coin was flipped a maxium number times of five. What is the expected value for the number of flips required to get either 3 heads or 3 tails.

I know the probability of head or tails is 0.5 and I am not sure where to go from this.

Thanks

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# Expected Value - Please Help

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