the probability for G or B is 1/2
1/2*1/2*1/2*1/2 = 1/16
BBGG = 1/16
BGBG = 1/16
BGGB = 1/16
GBGB = 1/16
GBBG = 1/16
GGBB = 1/16
1/16+1/16+1/16+1/16+1/16+1/16 = 6/16 = 3/8
I'm trying to see what's wrong with my method...if you can help.
I got the same answer using the method above. However, when I use this method, I get different answer:
Say if you have the first 2 child, you have have either BB,BG,GB,GG. This means that the first 2 child doesn't affect the probability. So, wouldn't the last two child pick would be 1/2 * 1/2 = 1/4?