30. A probability histogram of a binomial distribution is shown below. Probability histogram of a binomial distribution 25 20 15- Probability (percent) 10 Values of X What are the number of trials n and the success probability p for this binomial distri- bution? (a) * n = 10, p = 0.4 (b) n = 10,p = 0.5 (c) n = 20, p = 0.2 (d) n = 20, p = 0.4 (e) n = 100, p = 0.04 31. A small sample of size n = 6 is to be taken from a large population in which the pro- portion of "successes" is 0.40. Use this information for this question and the following question. What is the probability of observing exactly 3 successes in the sample? (a) 0.8208 (b) 0.4672 (c) 0.3110