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Three research departments have 7,10,8 members, respectively. Each department is to select a delegate and an alternate
to represent the department at a conference. In how many ways can this be done?
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The solution and the answer are in one line
It can be done in (7*6) * (10*9) * (8*7) = 211680 ways.
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Watch my factors (!)
The formula is self-explanatory (!)