In: Statistics and Probability
A fair four sided die has two faes numbered 0 and two faces numbered 2. Another fair four sided die has its faces numbered 0,1,4, and 5. The two dice are rolled. Let X and Y be the respective outcomes of the roll. Let W = X + Y.
(a) Determine the pmf of W.
(b) Draw a probability histogram of the pmf of W
Answer:
Given Data,
A fair four sided die has two faces numbered 0 and two faces numbered 2. Another fair four sided die has its faces numbered 0,1,4, and 5.
The two dice are rolled. Let X and Y be the respective outcomes of the roll. Let W = X + Y.
The sample space will consist of X,Y{00,01,04,05,20,21,24,25}
Thus the sample space of W which is the sum of X and Y will consist
of {0,1,2,3,4,5,6,7}
Thus the pmf will be,
X | P(X) |
0 | 1/8 |
1 | 1/8 |
2 | 1/8 |
3 | 1/8 |
4 | 1/8 |
5 | 1/8 |
6 | 1/8 |
7 | 1/8 |