I am trying to understand this question but not having much luck:
Suppose two fair dice are tossed one time. Let X be the number of 1's observed and Y be the number of 4's observed. Represent this in the form of a joint pf table.
This is what I tried but the sum of rows/cols is not 1 so it can't be right
X
0 1 2
_________________________
0 | 0 1/36 2/36 |
Y 1 | 1/36 1/36 0 |
2 | 2/36 0 0 |
__|___________________|_
| not 1