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Mathematics 15 Online
OpenStudy (anonymous):

assume that you are to pick 3 cars from the motor pool, which contains 8 subcompact cars, 9 compact cars, and 4 midsize cars. How many ways can you pick the cars so not all are the same size?

OpenStudy (anonymous):

please help

OpenStudy (anonymous):

8*9*4=288 since you can only pick one of each car.

OpenStudy (anonymous):

thats wrong

OpenStudy (anonymous):

wait, misread

OpenStudy (anonymous):

do you know how to do this?

OpenStudy (anonymous):

21C3-8C3-9C3-4C3

OpenStudy (anonymous):

21C3 is the total possibilities

OpenStudy (anonymous):

rest are just choosing 3 of one type of car

OpenStudy (chihiroasleaf):

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