At a certain hospital, 40 patients have lung cancer, 30 patients smoke, and 25 have lung cancer and smoke. Suppose the hospital contains 200 patients. If a patient chosen at random is known to smoke, what is the probability that patient has lung cancer?

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Answer 1 · 2016-02-18T01:46:58

#5/6 ~~83%#

Of the #30# patients who smoke, #25# have lung cancer.

So if your patient smokes, there is a probability of #25/30=5/6~~83%# that your patient has lung cancer.