Gerald732 SG "How many signals, each is composed by 9 flags hung in a vertical line, can be formed from 3 identical yellow flags, 4 identical blue flags, and 2 identical red flags?" Answer : 1260
wishboy SG 9!/(2!3!4!)I'm sure this is in your notes...It's just like asking how many different words can be formed from the letters AAAABBBCC