Solution
Given that ,
Using binomial probability formula ,
P(X = x) = (n C x) * px * (1 - p)n - x
P(X = 2) = (4 C 2) * 0.52 * (0.5)2
Probability = 0.375
here this is binomial distribution with paramter p=0.5 and n=4
hence probability of exactly 2 games won by Colonists = =0.375
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