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A bag contains 5 coins. Four of them are fair and one has heads on both sides. You randomly pulled one coin from the bag and tossed it 5 times, heads turned up all five times. What is the probability that you toss next time, heads turns up. (All this time you don't know you were tossing a fair coin or not).

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    What do *you* think? Where are you stuck?2011-08-07
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    should I consider this problem as independent of previous toss or not?2011-08-07
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    **Hint**: Consider how you'd answer if at least one of the previous tosses had been a tail.2011-08-07

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