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OpenStudy (anonymous):
A sample of 4 persons is selected for a test from a group containing 12 smokers and 20 nonsmokers. In how many ways can the 4 persons be selected?
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OpenStudy (anonymous):
35960
OpenStudy (anonymous):
how did you get that?
OpenStudy (anonymous):
it doesn't matter how you select 4 persons so its a combination problem to choose 4 from 32 32!/4!(32-4)!
OpenStudy (a_clan):
32C4
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