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bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
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The four major blood types are present in approximately the following proportions in the population of the U.S.A.
Type |
A |
B |
AB |
0 |
Proportion |
42% |
10% |
4% |
44% |
Note that each person’s blood is exactly one of these four types. Type AB is a separate type, not the intersection of type A and type B,
a)Â Â Â Â Â Â If two people are picked at random from this population, what is the chance that their blood is of the same type? Of different type?
b)Â Â Â Â Â If four people are picked at random, let P(k) be the chance that there are exactly k different blood types among them. Find P(k) for k = 1, 2, 3, 4,.
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