probability
posted by courtney
7 white socks anf four black socks are in a bag. if two socks are drawn at random, what is the probability that both socks are the same color?
thank you so much for the help

yasha
3 out of 11

bobpursley
stop it.

courtney
i'm sorry, i don't understand this response. does it mean the first answer 3/11 is incorrect?

bobpursley
Pr(both)=Pr(both black) + prob(white)
= 4/11*3/10 + 7/11*6/10 
courtney
Mr. Pursley,
thank you for taking the time to answer my question. i very much appreciate the help.
just to clarify, then the answer would be
(.3636*.3)+(.6363*.6)=0.49
is this right? 
bobpursley
correct.

courtney
thank you again for all the help
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