Four red cards are numbered 1,2,3 and 4. Three black cards are numbered 5,6,7. The cards are placed in a box and one card is selected at random. What is the probability that a red card was selected given that the number on the card was an even number?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Four red cards are numbered 1,2,3 and 4. Three black cards are numbered 5,6,7. The cards are placed in a box and one card is selected at random. What is the probability that a red card was selected given that the number on the card was an even number?
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