SOLUTION: Given 7 flags of different colors, how many different signals can be generated if a signal requires the use of two flags, one below the other?

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Question 1191875: Given 7 flags of different colors, how many different signals can be generated if a signal requires the use of two flags, one below the other?
Answer by ikleyn(52824) About Me  (Show Source):
You can put this solution on YOUR website!
.

There are 7*6 = 42 different ordered pairs of 7 colored flags;


so, 42 different signals are possible.    ANSWER

Solved.