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An integer in picked from 1 to 20, both inclusive. Find the probability that it is a prime. |
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Answer» Let E be the event that the number picked from 1 to 20 is a prime and S be the sample space. ∴ n(S) = 20C1 = 20 E = {2, 3, 5, 7, 11, 13, 17, 19} n(E) = 8 P(E) = n(E)/n(S) = 8/20 = 2/5 |
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