For a binomial probability distribution, n = 120 and p = .60. Let x be the number

Question:

For a binomial probability distribution, n = 120 and p = .60. Let x be the number of successes in 120 trials.
a. Find the mean and standard deviation of this binomial distribution.
b. Find P(x < 69) using the normal approximation.
c. Find P(67 < x < 73) using the normal approximation.