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Two Coins

Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.

 

Puzzle ID:#29228
Fun:*** (2.66)
Difficulty:** (1.81)
Category:Probability
Submitted By:lips*****
Corrected By:Winner4600

 

 

 



Suppose I flip two coins without letting you see the outcome, and I tell you that at least one of the coins came up heads. What is the probability that the other coin is also heads?


Hint

You might initially think that the answer is 1/2, but it is not so.
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