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Mathematics 20 Online
OpenStudy (anonymous):

A drawer contains 12 brown socks, 8 white socks, and 2 blue socks. One sock is selected at random. What is the probability that the sock is blue, given that it is not brown? A)1/4 B)1/5 C)1/10 D)1/11. I think it's 1/5

OpenStudy (excalibur0126):

1/5 would be right.

OpenStudy (anonymous):

how did you get that

OpenStudy (anonymous):

You are told that the chosen sock is not brown. There are 10 socks that are not brown. Two of the socks are blue. Therefore, the probability is 2/10, or 1/5.

OpenStudy (anonymous):

okay thank you!

OpenStudy (anonymous):

You're welcome.

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