In a box there are 9 red, 3 blue, and 6 yellow socks. One sock is picked up randomly. What is the probability that it is neither red nor blue?

Total number of socks = 3 + 6 + 9 = 18 Let E= event that the socks drawn is neither red nor blue = event that the socks drawn is yellow. n (E) = 6 P (E) = 6/18 = 1/3

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