there are 12 black and 12 white socks.... p(bb)+p(ww) is what we want... p(bb)=12/24*11/23 p(ww)=12/24*11/23
so it is just 2*12/24*11/23=11/23 On Wed, Aug 3, 2011 at 9:08 PM, Prakash D <[email protected]> wrote: > no.. it's really easy to find it out > > there are 12 black and 12 white pieces. > > let black =1 and white =0 > > the possible results are 11, 00, 10, 01 > > > number of ways of 11 solutions= 12 * 11 = 132 > number of ways of 00 solutions = 12 * 11 = 132 > number of ways of 10 solutions = 12 * 12 = 144 > number of ways of 01 solutions = 12 * 12 = 144 > > > we need the prob of 10 + prob 01 ==> (144+144)/(132+ 132 + 144 + 144) > > =288/552 = 36/69 = 12/23 > > I think 11/23 is wrong > > > > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
