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OpenStudy (anonymous):
A train is made up of a locomotive, 7 different cars, and a caboose. If the locomotive must be first, and the caboose must be last, how many different ways can the train be ordered?
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OpenStudy (anonymous):
please help(:
OpenStudy (anonymous):
it is easy..... total 7 cars can be arranged by 7! i.e. 5040
OpenStudy (anonymous):
it is 7factorial
OpenStudy (anonymous):
how do you get 5040?
OpenStudy (anonymous):
7 *6*5*4*3*2*1
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OpenStudy (anonymous):
oh i see. thank you! that makes sense now
OpenStudy (anonymous):
Welcome...
OpenStudy (anonymous):
|dw:1365287963567:dw|
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