SOLUTION: When treated with an antibiotic, 90% of all the dolphins are cured of an ear infection. If 5 dolphins are treated, find the probability that exactly 4 are cured.

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Question 768672: When treated with an antibiotic, 90% of all the dolphins are cured of an ear infection. If 5 dolphins are treated, find the probability that exactly 4 are cured.
Answer by reviewermath(1029) About Me  (Show Source):
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Q:
When treated with an antibiotic, 90% of all the dolphins are cured of an ear infection. If 5 dolphins are treated, find the probability that exactly 4 are cured.
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A:
X~Binomial(5,0.9)
P(X = 4) = %28matrix%282%2C1%2C5%2C4%29%29%280.9%5E4%29%280.1%5E1%29 = highlight%280.32805%29