Three ballpoint pens are selected at random from a box that contains 2 blue pens, 2 red pens, and 2 green pens. If X is the number of blue pens selected and Y is the number of red pens selected, find the covariance between X and Y . Show work.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Three ballpoint pens are selected at random from a box that contains 2 blue pens, 2 red
pens, and 2 green pens. If X is the number of blue pens selected and Y is the number of
red pens selected, find the covariance between X and Y . Show work.

 

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