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# OR' and 'AND' Probabilities

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There are thirteen shirts in your closet, four blue, five green, and four red. You select one to wear. What is the probability that you pick a blue OR green shirt?

May 6, 2021

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probability of picking blue = $$\frac{4}{13}$$

probability of picking green = $$\frac{5}{13}$$

probability of picking blue OR green = $$\frac{4 + 5}{13} = \boxed{\frac{9}{13}}$$

May 6, 2021