SOLUTION: 70% of disk drives made from Com drive function properly. If we have a collection of 5 disk drives what is the probability that: (worth 10 points, 5 points apiece) a) At least

Question 879596: 70% of disk drives made from Com drive function properly. If we have a collection of 5 disk drives what is the probability that: (worth 10 points, 5 points apiece)
a) At least one disk drive doesn�t function?
b) At least one disk drive is functioning

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p(good) = .70, p(def) = .30, n = 5
a)P(at least one def) = 1 - P(all good) = 1 - (.80)^5
b) P(at least one good) = 1 - P(all bad) = 1 - (.30)^5
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