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Mathematics 10 Online
OpenStudy (anonymous):

How many different signals can be made by using at least 2 different flags if there 4 different flags from which to select?

OpenStudy (anonymous):

Can you have the flags out of order? ...What I mean to say is ... say the flags were numbered 1 2 3 4...could you have 1 4 and 4 1 be 2 signals?

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