Solution
Given that ,
p = 0.62
1 - p = 1 - 0.62 = 0.38
n = 30
Using binomial probability formula ,
P(X = x) = (n C x) * px * (1 - p)n - x
P(X = 22 ) = (30 C 22) * (0.62)22 * (0.38)58
Probability = 0.0689
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