What is the probability that other side is also tail ?

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I have two coins.
* One of the coin is a faulty coin having tail on both side of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blind fold myself and pick a coin and put the coin on table. The face of coin towards the sky is tail.

What is the probability that other side is also tail ?

posted Jun 13
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1 Answer

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Here we have 3 tails and 1 head.
Since we have 1 tail exposed at the beginning itsellf, the probability of the flip side to be tails drops from 3/4 to 2/3 which is also the answer to this question.

answer Jun 14

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