Production line workers assemble 15 automobiles per hour, Basic Statistics

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Production line workers assemble 15 automobiles per hour

Production line workers assemble 15 automobiles per hour. During a given hour. four are produced with improperly fitted doors. Three automobiles are selected at random and inspected. Let X denote the number inspected that have improperly fitted doors.

(a) Find the density for X.

(b) Find E[X] and Var X.

(c) Find the probability that at most one will be found with improperly fitted doors.

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Basic Statistics: Production line workers assemble 15 automobiles per hour

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