00:02
We have our table for x, the random variable, which is the number of years to earn a bs degree, and then the given probabilities for each one of those years.
00:13
And then in part b, it says it wants us to verify this is a legitimate probability distribution.
00:19
We can verify that by adding up our five probabilities, and they total up to 1 .00 or 100%.
00:27
So we know we've got all of the data.
00:30
Now, what's the probability of completing your degree in three years? well, we're just going to look at the chart.
00:37
That is 0 .05.
00:40
What's the probability of completing it at most five years? that means we could do it in three, four, or five years.
00:49
So we're going to add up the probabilities for three, four, or five years, and that'll give us a 0 .75 or a 75 % chance of getting our degree at most...