SOLUTION: Blood type AB is found in only 3% of the population. If 225 people are chosen at random, what is the probability that a) 5 or more will have this blood type?

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Question 223316: Blood type AB is found in only 3% of the population. If 225 people are chosen at random, what is the probability that
a) 5 or more will have this blood type?
b) Between 5 and 10 will have this blood type?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Blood type AB is found in only 3% of the population. If 225 people are chosen at random, what is the probability that
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It's a binomial problem with n = 225 and p = 0.03
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a) 5 or more will have this blood type?
Solve P(5 <= x <= 225) = 1 - binomcdf(225,0.03,4) = 0.8072
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b) Between 5 and 10 will have this blood type?
Solve P(5 <= x <= 10) = binomcdf(225,0.03,10) - binomcdf(225,0.03,4)
= 0.7286
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Cheers,
Stan H.