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Mathematics 14 Online
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?

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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