# Problem 181: Investigating in how many ways objects of two different colours can be grouped
Having three black objects B and one white object W they can be grouped
in 7 ways like this: (BBBW)(B,BBW)(B,B,BW)(B,B,B,W)
(B,BB,W)(BBB,W)(BB,BW) In how many ways can sixty black objects B and
forty white objects W be thus grouped?