the mathematics faculty at a college consists of 12 professors, 9 associate professors, 5 assistant professors, and 5 instructors. if one faculty member is randomly selected, find the probability of choosing a professor of instructor.

Question

saifoo.khan · Answer

professor of instructor OR professor or instructor?

kropot72 · Answer

There are 31 members of the faculty. The probability of choosing a professor is 12/31. The probability of choosing an instructor is 5/31. The events 'choose a professor' and 'choose an instructor' are mutually exclusive. Therefore the probability of choosing a professor or an instructor is the sum of the two probabilities.

anonymous · Answer

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