00:01
Hi, i'm david and i'm here to have the answer your question.
00:04
Now let me bring up your question here.
00:07
In this question here let me try to summarize the question by the venn diagram.
00:14
So this will be the sample space as i will call the junior students with the j and then we will have j here.
00:24
It will equal to the 0 .6 which is 60%.
00:30
And then we will have the c stander.
00:33
For the grade c and c it will equal to the 0 .3.
00:41
And we have the junior with the grace c.
00:44
It means that the intersection between them here, it will equal to the 20%, which is equal to the 0 .2 in the middle.
00:54
And if we have that, therefore the one we changed it on the outside, see here.
01:02
This one here it will equal to the 0 .1.
01:06
And the one we have on the left of the tree it will equal to the z -bun -4 and then we will see totally the outside here it will equal to 1 minus the z -bond 4 minus 0 minus 1 equal to the z -1 outside now we are ready to answer the question a what is the probability that the junior obtained a c grade? so it means that i want to find the j and then intersection of the c...