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Can anyone help me with question 1.iv, 2.i and 2.iii because I don't understand them!ImageUploadedByStudent Room1420980463.572952.jpg


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Original post by Medically
Can anyone help me with question 1.iv, 2.i and 2.iii because I don't understand them!ImageUploadedByStudent Room1420980463.572952.jpg


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For 1.iv: Where Y = aX + b, E(Y) = aE(X) + b and Var(Y) = a2Var(X)

2.i: I think they want you to say that the probabilities must sum to one, so the probability of 30 is 1 - the sum of the probabilities of the others.

2.iii: Set Y = 2X + 50, use the formulas for 1.iv

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