Answer:
30 different signals
(n = no. of objects)
(r = no. of objects selected)
Step-by-step explanation:
this is a permutation problem so use the formula:
5P5 / 2! 2! 1! <- its 5 P 5 because there are 5 flags, 2 red, 2 white, and 1 blue
[5! / (5 - 5)!] / 2 x 2 x 1 <- the permutation formula is: n! / (n - r)!
= 120 / 4
= 30
(i know this was like 6 years ago but just in case someone needs the correct answer)
