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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?
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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?
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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):
|dw:1347933402266:dw|
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