Cards

Suppose that are three cards in the hats. One is red on both sides, one of which is black on both sides, and a third one side red and the second black. We are pulled out of a hat randomly one card and we see that one side of it is red. What is the probability that the second side is red?

Result

p =  0.5

Solution:

p=1/2=12=0.5p=1/2=\dfrac{ 1 }{ 2 }=0.5



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