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OpenStudy (anonymous):
Two common sources of nicotine are cigarettes and cigars. Suppose that 35% of the adults in the United States smoke cigarettes but not cigars and 10% smoke both cigarettes and cigars. Find the probability that a randomly selected adult does not smoke cigarettes. (Hint: Draw a Venn diagram.)
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OpenStudy (anonymous):
is it 55%
OpenStudy (anonymous):
how did you get 55%?
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