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Question: A typesetting agency used by a scientific journal employs two typesetters. Let X₁ and X₂ denote the number of errors committed by typesetter 1 and 2, respectively, when asked to typeset an article. Suppose that X₁ and X₂ are Poisson random variables with expected values 2.6 and 3.8, respectively.

(a) What is the variance of X₁and of X₂?

(b) Suppose that typesetter 1 handles 60% of the articles. Find the probability that the next article will have no errors.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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