If two events, A and B, are independent, then the probability that both A and B will occur is equal to the product of their individual probabilities.
P(A intersect B) = P(A)*P(B), given that A and B are independent.
Now your time to try:
Suppose
(A) a married person has 1 in 50 chance of getting divorced each year;
(B) a police officer has 1 in 5,000 chance of being killed on the job each year.
What is the probability of a married police officer will be divorced and killed in the same year?
Think it carefully. Tricky?!
Tuesday, November 17, 2009
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