Sample Space, Events and Probability - University of Illinois Urbana ...

One can easily nd the probability of each E i, adding them up, we get P(E) = 1 2. Example 18 A fair die is tossed 100 times. Find the probability that there is at least one 5. Solution. Let E be the event that there is at least one 5. Then Ec is the event that there is no 5 and P(Ec) = (5 6) 100. Thus P(E) = 1 (5 6) 100. ................
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