Statistics Homework Solutions
#10703
Poisson approximation to binomial distribution
In a large town, one person in 80, on the average, has blood of type X.
a)If 200 blood donors are taken at random, find an approximation to the probability that they include at least five persons having blood of type X.
b)How many donors must be taken at random in order that the probability of including at least one donor of type X shall be 0.9 or more?
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