Ten percent of the items produced by a machine are defective. Out of 15 items chosen at random,
a. what is the probability that exactly 3 items will be defective?
b. what is the probability that less than 3 items will be defective?
c. what is the probability that exactly 11 items will be non-defective?
a. .1285
b. .816
c. .0428
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