Recent content by weibing86

Hi, I have tried to solve this by narrowing my sample size. I used 3 pairs of socks (red, red), (blue, blue), and (yellow, yellow). The combination of picking 2 socks of same or different colors will be 6 (rr, rb, ry, bb, by, yy). I can list out all the combinations as the sample size...

I don't even know how to start this question: I have 6 pairs of socks (12 socks) of different colors. If I choose 4 socks randomly, what is the probability that I will pick 2 socks of same color, and the other 2 are different colors?

Hi, I have problem with your explanation. Assume that we have four persons. P(nobody shares same birthday) = 365/365 X 364/365 X 363/365 X 362/365 = 47831784/48627125 P(2 persons share same birthday) = 365/365 X 1/365 X 4C2 X 364/365 X 363/365 = 792792/48627125 P(3 persons share same...