a) Evaluate the marginal distribution of X and Y. b) Find P(Y/X) and P(X/Y). c) Find P(Y=2/X=3).

Q: the odds against the event happening?

A: here p = probability of event  = 88/89

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A: From the provided information, P (D’|N) = 0.91 and P (D|N’) = 0.79 P (N’) = 0.09

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Q: Show V(X)

A: The joint probability mass function of X and Y is  f(x,y)=(x+y)/21   , x=1,2,3 and y=1,2

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