A lot of 20 bulbs contains 4 defective ones. One bulb is drawn at rand – InterviewSolution

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1.	A lot of 20 bulbs contains 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?
Answer» A lot of 20 bulbs contains 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?

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