71mjroberts 71mjroberts

15-04-2018
Mathematics

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A drawer contains 4 red socks, 7 white socks, and 11 blue socks. Without looking, you draw out a sock and then draw out a second sock without returning the first sock. Find P(red, then white).

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15-04-2018

Total socks = 4 + 7+ 11 = 22
Red = 4
White = 7

P(red, then white) = (4/22)(7/21) = 2/33

Answer: 2/33

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