20/ On a particular production line, the likelihood that a light bulb is defective is 5%. Ten light bulbs are randomly selected. a/What are the mean and variance of the number of defective bulbs? A) 0.475 and 0.475 B) 0.475 and 0.6892 C) 0.50 and 0.475 D) 0.50 and 0.6892 b/What is the probability that two light bulbs will be defective? A) 0.0105 B) 0.0746 C) 0.3151 D) 0.5987
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