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- Suppose at our given hospital, in a month’s time 24 patient undergo open heart surgery. Let V be the number of patients who die within the first 30 days of undergoing open heart surgery.
V ~ B(24, 0.15)
- What’s the probability that more than 5 patients die in the 30 days after undergoing open heart surgery?
P(V > 5) = P(V = 6) + P(V = 7) + P(V = 8) + … + P(V = 24)
Or P(V > 5) = 1 – P(V ≤ 5 ) = 1 – (P(V=0) + P(V=1) +…+ P(V=5))