In how many ways can a necklace be made using 6 identical red beads and 2 identical blue beads ?
Say I have a box that contains 4 red balls , 10 green , and 1 blue -LRB- identical in every way aside from color -RRB- . How many times would an observer need to randomly draw balls from this box -LRB- replacing and mixing each time -RRB- before being able to determine the respective proportions within standard error ?