A drawer is filled with 9 black shirts , 6 white shirts, and 5 gray shirts one shirt is chosen at random from the drawer find the probability that it is not a white shirt

P(Not White) = P(Black or Gray)
P(Black or Gray) = (Total Black + Total Gray)/Total Shirts
P(Black or Gray) = (9 + 5)/(9 + 6 + 5)
P(Black or Gray) = 14/20

Simplifying this using our fraction simplify calculator, we get:
P(Black or Gray) = 7/10, or 0.7 or 70%

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