SOLUTION: how many different signals can be made by useing at least 9 different flags if there are 12 different flags from which to select?

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Question 848564: how many different signals can be made by useing at least 9 different flags if there are 12 different flags from which to select?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

Order Important: 12P9

Order Not Important:  12C9