Question -
Answer -
Given:
Number of red flags =4
Number of white flags= 2
Number of green flags= 3
So there are total 9flags, out of which 4 are red, 2 are white, 3 are green
By using the formula,
n!/ (p! ├Ч q! ├Ч r!) =9! / (4! 2! 3!)
= [9├Ч8├Ч7├Ч6├Ч5├Ч4!] /(4!├Ч2├Ч1├Ч3├Ч2├Ч1)
= [9├Ч8├Ч7├Ч6├Ч5] /(2├Ч3├Ч2)
= 9├Ч4├Ч7├Ч5
= 1260
Hence, 1260 differentsignals can be made.