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Can You Solve The 3 Cards Riddle?

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 Brain Teasers   |   Math
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There are 3 cards in this problem. One card is blue on both sides, another is red on both sides, and the last is red on one side and blue on the other. The cards are put in a bag and I pick one at random. Without looking at the colors on the card, I place the card on a table. The face up side shows blue. What is the probability the other side, the face down side, is also blue? This video presents a solution to this problem and then presents a simulation in a spreadsheet to confirm the theoretical calculation.

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