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The mathematics faculty at a college consists of 11 ​professors, 55 associate​ professors,11 assistant​ professors, and 55 instructors. If one faculty member is randomly​ selected, find the probability
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The mathematics faculty at a college consists of 11 ​professors, 55 associate​ professors,11 assistant​ professors, and 55 instructors. If one faculty member is randomly​ selected, find the probability of choosing a professor or an instructor.

User Scott Kurz
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1 Answer

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P(PorI)=(11+55)/(11+55+11+55)

P(PorI)=66/132

P(PorI)=1/2
User Leonardo Lanchas
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