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How is ex defined in terms of an infinite sum

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Reference no: EM13956391

If x and y are discrete random variables with a joint pdf of

2 x+y

f (x,y) = c

a. Find the constant c

b. Find the marginal pdf's

c. Are x and y independent?

Hint: How is ex defined in terms of an infinite sum?

Reference no: EM13956391

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