Question

the probability that a patient recovers from a delicate heart operation is 0.9 of the next 100 patients having this operation. what is the probability that between 1)between 84 and 95 inclusive survive 2)fewer than 86 survive
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Answer 1

Answer:

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Answer 2

From the given information,

The probability that the patient recovers from a delicate heart operation is 0.9 and the number of patients is 100.

Let X be a random variable represents the number of patients who survive among 100 patients having a delicate heart operation survive.

Let us consider the patient surviving in that operation as a success and the probability of success in each trial is

Here, clearly