Asked by Anonymous
A pizza store owner noticed that a random count (Y) of pizzas ordered by students who reside on campus has distribution shown below
Y 1 Probability 0.15
Y 2 Prob 0.40
Y 3 Prob 0.25
Y 4 Prob 0.20
1. Find expected number of pizza order E[Y]
2. Determine variance of Y
3. Assume the revenue (R) after selling Y pizzas is measured as
R=8 * Y - 10. Evaluate expected revenue after order is completed, that is E[R]
4. For the same variable R=8 * Y - 10, determine its variance
Var [R]
I am very confused on how to start this off can anyone help me
Y 1 Probability 0.15
Y 2 Prob 0.40
Y 3 Prob 0.25
Y 4 Prob 0.20
1. Find expected number of pizza order E[Y]
2. Determine variance of Y
3. Assume the revenue (R) after selling Y pizzas is measured as
R=8 * Y - 10. Evaluate expected revenue after order is completed, that is E[R]
4. For the same variable R=8 * Y - 10, determine its variance
Var [R]
I am very confused on how to start this off can anyone help me
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