求解 请高手指点
The Turkuman Rug Company buys medium grade carpet in 100-foot rolls. The average number of defects per roll is 1.8. Assuming that these data follow a Poisson distribution, use the Poisson spreadsheet template to answer the following questions.
a. What is the probability of finding exactly 7 defects in a carpet roll chosen at random?
b. What is the probability of finding 4 or fewer defects in a carpet roll?
a. What is the probability of finding exactly 7 defects in a carpet roll chosen at random?
b. What is the probability of finding 4 or fewer defects in a carpet roll?
Please use Chinese when you are asking questions. Then you can get more useful answers.
I never tell a lie, if you still ask questions in English, you will not get any answer.
I never tell a lie, if you still ask questions in English, you will not get any answer.
2016-11-08 14:20
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