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A small-business Web site contains 100 pages and 60%, 30%, and 10% of the pages contain low, moderate, and high graphic content, respectively. A sample of four pages is selected without replacement, and X and Y denote the number of pages with moderate and high graphics output in the sample. Determine

(a) fXY (x, y)

(b) fX (x)

(c) E(X)

(d) fY|3 (y)

(e) E(Y)|X = 3)

(f) V(Y|X = 3)

(g) Are X and Y independent?

(a) fXY (x, y)

(b) fX (x)

(c) E(X)

(d) fY|3 (y)

(e) E(Y)|X = 3)

(f) V(Y|X = 3)

(g) Are X and Y independent?

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