A manuscript is sent to a typing firm consisting of typists A, B, and C. If it is typed by A, then the number of errors made is a Poisson random variable with mean 2.6; if typed by B, then the number of errors is a Poisson random variable with mean 3; and if typed by C, then it is a Poisson random variable with mean 3.4. Let X denote the number of errors in the typed manuscript. Assume that each typist is equally likely to do the work.© BrainMass Inc. brainmass.com November 29, 2021, 11:49 pm ad1c9bdddf
E(A) = 2.6
E(B) = 3
E(C) = 3.4
P(A)=1/3 ( same for P(B), AND ...
The solution works with the Poisson random variable problem.