Posted by chandice on Sunday, September 6, 2009 at 9:41pm.
A ship carries exactly 10 different signal flags. If each
possible combination and ordering of 4 of these flags
connotes a specific message, how many signals can be
sent with these flags, taken 4 at a time?

math  bobpursley, Sunday, September 6, 2009 at 10:13pm
10*9*8*7
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