Question

At a college, 72% of courses have final exams and 42% of courses require research papers. Suppose that 28% of courses have a research paper and a final exam.

Find the probability that a course has a final exam or a research paper.

Answer 1

I think it is

To find the probability that a course has a final exam or a research paper, you can use the principle of inclusion-exclusion.

P(Final exam or Research paper) = P(Final exam) + P(Research paper) - P(Final exam and Research paper)

P(Final exam or Research paper) = 0.72 + 0.42 - 0.28

P(Final exam or Research paper) = 0.86

So, the probability that a course has a final exam or a research paper is 0.86 or 86%.


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