The total number of ways could be found by innumerating all the possible cases, which are
B1 B2 B3
[5 0 0] [4 1 0] [3 2 0] [3 1 1] [2 2 1]
Hence 5 is the answer.
The total number of ways could be found by innumerating all the possible cases, which are
B1 B2 B3
[5 0 0] [4 1 0] [3 2 0] [3 1 1] [2 2 1]
Hence 5 is the answer.