The number of surface flaws in gypsum board panels used in the ceiling of a medium cost housing has a Poisson distribution with a mean of 0.005 flaw per square foot of gypsum board panel. Assume one housing’s ceiling contains 100 square feet of gypsum board panel. What is the probability that there are no surface flaws in the housing’s ceiling? a. 0.6560 b. 0.6065 c. 0.3935 d. 0.3539

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