# 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

1. yasha

3 out of 11

2. bobpursley

stop it.

3. courtney

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

4. bobpursley

Pr(both)=Pr(both black) + prob(white)
= 4/11*3/10 + 7/11*6/10

5. 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?

6. bobpursley

correct.

7. courtney

thank you again for all the help

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