4. Let R1, R2 be the result of two independent rolls of a fair die. Let S= R1+R2 and D= R1 – R2 be their sum and difference. %3D (a) Show that E(SD) =E(S)E(D). (b) Are S,D independent?

Q: 4. 3. 4, 8.

A:

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A: 514+16=15+742

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A:

Q: 24

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