00:01
Hi, i'm david and i'm here to have you answer your question.
00:03
In this question here, we are going to discuss about the table of the probability for the random variable x will be the number of the classes you are taking this semester.
00:14
So let me copy the table of the frequency because i'm not allowed to copy the full question.
00:20
So you copy the portion of your question here and put it on the right.
00:25
Now from this table here we can answer the question a.
00:30
That when you find the probability that the student will take two or more classes, so means that x greater equal to the two, greater equal to the two means that we will add up on the probability from two to five.
00:44
And to make it easier, we can take the total probability will be one, we minus the remaining one, seven, then we can equal to the 0 .83.
00:54
Now for the question b, when you find the probability that the student taking at least three classes, could be quite equal to the 3.
01:02
So we'll add up from 3 to 5 and then we have the 0 .11 plus 0 .13 plus 0 .16 and then we can equal to the 0 .57.
01:18
For the question c, once you find the probability that the student is taking more than 3, so not including the 3.
01:25
It means then we should add up from 3 to the 5 will be the 0 .3 plus 0 .16 equal to the 0 .0.
01:36
Now for the question d, we need to find the probability that's taking less than two class.
01:43
So last time we'll be smaller than two.
01:45
It means that we can end up only one, so will be 0 .17 only.
01:51
And for the question e, we need to find the probability that's taken no more than 2.
01:57
So x can take the value of the 2, then we will add up from 1 to 2.
02:02
Then we have the 0 .17 plus 0 .26 and then we get equal to the 0 .43...