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Mathematics 21 Online
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?

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

OpenStudy (anonymous):

oh i see. thank you! that makes sense now

OpenStudy (anonymous):

Welcome...

OpenStudy (anonymous):

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