4.2. (a) The probability of success is p = 0.4, and the probability of failure is q = 0.6. (b) The probability of 3 successes in 5 trials is P(X = 3) = (5 choose 3) * (0.4)^3 * (0.6)^2 = 0.3456.
4.2. (a) The probability of success is p = 0.4, and the probability of failure is q = 0.6. (b) The probability of 3 successes in 5 trials is P(X = 3) = (5 choose 3) * (0.4)^3 * (0.6)^2 = 0.3456.