00:01
Hi, i'm david and i'm here to help you and change your question.
00:03
In this question here we're given the table on the probability for the blood group and the ethnic group.
00:09
So let me copy the table and put it on the top here.
00:12
Let me make it bigger.
00:14
Now let me compute the total for the column and the total for the row.
00:20
Here we have the 0 .082 plus 0 .14 plus 0 .25 equal to the 0 .4 -37.
00:29
37.
00:30
The next one we have 0 .101 plus 0 .141 plus 0 .199 equal to the 0 .441 and this one has the 0 .06 plus 0 .08 plus 0 .66 equal to the 0 .09.
00:50
This one has the 0 .04 0 .4 plus 0 .08 plus 0 .02 equal to the 0 .32.
00:59
And here we need to find the total as well.
01:02
0182 plus 0 .101 plus 0 .06 plus 0 .04 plus 0 .04 plus 0 .03 0 .14 plus 0 .04 plus 0 .03 equal to the 0 .141 plus 0 .04 and then the last one we will have the 0 .15 plus 0 .199 plus 0 .06.
01:45
Get equal to the 0 .48.
01:52
And now we are ready to answer the question now.
01:55
In the question we define the event a will be the type a plus.
01:59
That will be the event a, the b will be the type b plus, and the event c will be the end group 3.
02:07
And from here the question asks me to find the probability on the event a.
02:11
So we have found it already equal to 0 .441.
02:17
And the probability on the event c equal to the 0 .4a0...