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One prominent physician claims that 70% of those with lung cancer are chain smokers. If his assertion is correct:

One prominent physician claims that 70% of those with lung cancer are chain smokers. If
his assertion is correct:
a) Find the probability that of 8 such patients recently admitted to a hospital, fewer than
5 are chain smokers.
b) Find the probability that of 13 such patients recently admitted to a hospital, at least 6
are chain smokers.

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