SOLUTION: 1. The probability that a patient entering to a certain hospital will survive is 0.90. (From previous figures). Assuming this pattern remain unchanged over the subsequent years, wh

Question 1193665: 1. The probability that a patient entering to a certain hospital will survive is 0.90. (From previous figures). Assuming this pattern remain unchanged over the subsequent years, what is the probability that among 60 randomly selected patients,
a. None will survive?
b. Exactly 50 will survive?
c. At least three will survive?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
None will survive is 0.10^60=1 x 10^(-60)
exactly 50 is 60C50*0.9^50*0.1^10=0.0389
at least 3 will survive.
we know the probability for 0 is minuscule.
the probability for 2 is 60C2*0.9^2*0.1^58=1.4 x 10^(-55)
only 1 survival will be even more minuscule a probability, so the answer is 100%.
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