Awarehouse has 5,000 drums of liquid chemicals. the foreman knows that 50 of these drums contain off-quality chemicals. assume that the drum is replaced each time before sampling. what is the probability that none of 3 drums he selects at random are off-quality?

(1/100)_
(50x49x48)/(5,000_)
(99/100)_

Given that the drum is replaced each time before sampling, the selections are independent events. Then, the probability of the combined event is the product of each probability: (50/5000) * (50/5000) * (50/5000) = (1/100)^3 = 0.000001

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