00:01
So in this question, we are assuming that we have all the requirements for this distribution to be a probability distribution.
00:07
What means that requirement? that each value of the probability is greater or equal than zero.
00:14
And the sum of these probabilities, if you consider all the possible values for x here, and in this case, x can be either 2, 5, 6, or 8.
00:27
These need to sum up to 1.
00:28
1.
00:29
So in the question, we have the table like x, we have like 2, 5, 7, oh 6 and 8, not 7, and we have the probability of x.
00:42
We have the values for 2, 5, and 6, but we don't have for 8, right? so first we can complete the table.
00:53
So if we know that this should sum up to 1, we can find this value here as 1, which is the sum, minus the sum of the other values...