Paneling involve counting the number of surface flaws

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Quality-control checks on wood paneling involve counting the number of surface flaws on each panel. On a given 2 × 8 ft panel, let X be the number of surface flaws due to uneven application of the final coat of finishing material, and let Y be the number of surface flaws due to inclusions of foreign particles in the finish. The joint probability mass function p(x,y) of X and Y is presented in the following table. The marginal probability mass functions are presented as well, in the margins of the table. Find the covariance of X and Y

		y
x	0	1	2	pX (x)
0	0.05	0.10	0.20	0.35
1	0.05	0.15	0.05	0.25
2	0.25	0.10	0.05	0.40
pY(y)	0.35	0.35	0.30

Reference no: EM131121729

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