Sunday

January 25, 2015

January 25, 2015

Posted by **kim** on Friday, July 27, 2012 at 1:43pm.

- Math -
**Reo**, Friday, July 27, 2012 at 1:57pmI think it's nCk which the total of socks would be 12 since we have 6 whites and 6 black. you would have to choose 2. in that case order does not matter and we use the combination formula 12C2 = 66 possible ways.

- Math -
**Reiny**, Friday, July 27, 2012 at 2:18pmcould be either BB or WW

Prob(BB) = (6/12)(5/11) = 5/22

which is the same as the prob(WW)

so prob of either WW or BB = 2(5/22) = 10/22

(note only other cases are WB and BW

and the prob of those = 2(6/12)(6/11) = 2/11 or 12/22

and prob of all cases = 10/22 + 12/22 = 22/22 = 1 )

All is good!

- typo - Math -
**Reiny**, Friday, July 27, 2012 at 2:21pmcorrection in 3rd last line, should be

and the prob of those = 2(6/12)(6/11) =**6/11**or 12/22

**Answer this Question**

**Related Questions**

maths - michael has 10 pairs of black socks,8 pairs of white socks&7 pairs of ...

MATHS - Could you please explain how to do this question? Thank you very much. ...

Math - Mario has large drawer with only white and blacks socks. He has 3 times ...

math - a sock drawer contains 10 white socks, 6 black socks, and 8 blue socks. ...

math - Paul has 8 white socks, 4 blue socks,10 grey socks, and 12 black socks in...

math probability - A man is camping. He has packed 8 black socks, 8 blue socks, ...

math - Mariko walks into her dark room to pull socks out of the dresser. If she ...

math - A drawer contains 7 black socks, 5 white socks, and 3 brown socks. What ...

Meths - A drawer contains 22 black socks, 22 white socks, 22 blue socks, and 22 ...

math - A draw contains 3 black socks and 2 white socks. A sock isdrawn at random...