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20 % of all cartons of milk ordered for school lunches are defective in some way. Five such milk cartons are randomly selected. Thus we have independence.
a) What is the probability that none of the slected cartons are defective?
b) What is the probability that all the selected cartons are defective?
c) What is the probability that exactly 2 of the selected catons are defective?
d) What is probability that fewer than 3 of the selected cartons are defective?
e) What is the expected number of selected defective cartons?
f) What is the standard deviation of the number of selected defective cartons?
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