An urn contains 5 black and 20 white marbles. They are to be drawn one at a time until all of one color has been exhausted.

What is the probability that the color of the first draw correctly predicts the first color exhausted?

The way the puzzle is presented it is definitely not a D1.

(see my previous comment regarding interpretation: mismatch vs prediction)

Posted by Ady TZIDON on 2015-08-11 22:20:59