Historical data for a local steel manufacturing company shows that the average number of defects per standard sheet of steel is 2.In addition,the number of defects per unit is distributed according to Poisson distribution. A batch has just been completed.What is the probability that the first three units manufactured in this batch will contain at least a total of 4 defects?
A).8488
B).7149
C).1512
D).2851

Question

Quizplus · Accepted Answer

P(X F1F1F1S1F1F1F10 4)= 1 - [P(X = 0)+ P(X = 1)+ P(X = 2)+ P(X = 3)]P(X F1F1F1S1F1F1F10 4)= 1 - (.0025 + .0149 + .0446 + .0892)= .8488

Historical Data for a Local Steel Manufacturing Company Shows That