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Given the number of trials and the probability of success, determine the probability indicated: n = 15, p = 0.4, findP(4 successes) n = 12,

Given the number of trials and the probability of success, determine the probability indicated:

n = 15, p = 0.4, findP(4 successes)
n = 12, p = 0.2, findP(2 failures)
n = 20, p = 0.05, findP(at least 3 successes)

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