Answers
18) p = 0.19
P(X = 3) = (1 - 0.19)2 * 0.19 = 0.125
Option-A) 0.125
19) p = 0.21
P(X = 4) = (1 - 0.21)3 * 0.21 = 0.1035 = 10%
Option-B) 10%
20) p = 0.0017
P(X = 1) = 50C1 * 0.00171 * (1 - 0.0017)49 = 0.078 = 8%
Option-A) 8%
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