X denotes a binomial random variable with parameters n and p. For each exercise, indicate which area under the appropriate normal curve would be determined to approximate the specified binomial probability.
If x is a binomial random variable, find the probabilities below by using the binomial probability table.
a) P(x < 11) for n = 15, p = 0.1
b) P(x >= 11) for n = 25, p = 0.4
c) P(x = 2) for n = 20, p = 0.6