I am presented with the questions:
Flaws occur in mylar material according to a Poisson distribution with a mean of 0.05 flaw per square yard.
(a) If 29 square yards are inspected, what is the probability that there are no flaws? (b) What is the probability that a randomly selected square yard has no flaws? (c) Suppose that the mylar material is cut into 5 pieces, each being 1 yard square. What is the probability that 3 or more of the 5 pieces will have no flaws?
a) poissonpdf(29*.05,0) = .235
b) poissonpdf(.05,0) = .951
My problem is with part 'c'. I'm completely stumped on how to get the answer. I know it uses poissoncdf, but I can't get my numbers to make sense. Can anyone explain to me how I might go about getting the answer?