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Home Q & A Board Science-Related Homework Help Physics
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nutzshells nutzshells
wrote...
11 years ago
For a certain type of paper towel made of recycled paper, there is an average of 1 flaws (rougher parts) per meter. The number of flaws per meter can be approximated by a poisson distribution. (a) Find the probability of exactly 4 flaws in one meter. (b) If a length of 9 metres was examined by quality control, what lambda would be used to find the probability of exactly 7 flaws? (c) find the probability that in 9 metres there will be exactly 7 flaws?
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wrote...
#1
11 years ago
a. P[4] = e^-1 * 1^4 /4! = .0153 Leftwards Arrow----

b. 9*1 = 9 Leftwards Arrow-----------

c. e^-9 *9^7 /7! = 0.1171 Leftwards Arrow--------
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