WEBVTT
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alright for this problem, The probability of a is
2
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just going to be the some of the probabilities of
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having blood type A in any group. So that
4
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is going to be 0.106 plus 0.141 plus 0.200 which
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is equal to 0.4 for seven. Probability of C
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is similarly going to be the some of the probabilities
7
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of being in ethnic Group three with any blood type
8
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is going to be a point to 15 plus 150.200
9
00:00:37.719 --> 00:00:49.759 A:middle L:90%
plus 0.65 plus 0.20 is equal Thio 0.5 Next,
10
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the probability of a intersected with me is just the
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going to be the probability, knowing that we are
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in blood type A that we will have ethnic group
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three. So the probability of a intersected with B
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is 0.200 You could get that straight from the table
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. Next the probability of a given see So we
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know that we're in ethnic Group three. What's the
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probability of having blood Type A that is equal to
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he of a Intersect see divided by probability of C
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, which is going to give us just But you
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can plug in the numbers there That gives us 0.4
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Similarly similarly, the probability of C given a is
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probability of a Intersect see divided by the probability of
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a which in our case, is going to be
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about. Actually, I'll put all the decimal places
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that I have 0.4474 to 7 next for the part
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. See, the way to interpret the question is
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that we want to find the probability that we are
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in group one, given that we are not type
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V. So that is the same as good as
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one minus the probability of being in group one Given
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that we are or yeah, given that we are
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type B, so you need to figure out Well
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, that's ah probability of Group one given type B
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that is going to be the same as probability of
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all right. Oh, yeah. Group one intersect
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be divided by the probability of being blood type B
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. Okay, The probability of being group one and
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blood type B is 0.8 or sorry. 0.8 Up
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there 008 then the probability of type of being Type
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B is point 008 plus 80.18 plus 0.0 point six
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or plus 0.65 rather 0.65 just going to be that
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comes out to 0.91 2088 So that is the probability
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that we are in Group One, given that we
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do not have blood type B.