Thirty-one percent of people in the United States have type A+ blood. You randomly select 40 people

Question:

Thirty-one percent of people in the United States have type A+ blood. You randomly select 40 people in the United States and ask them whether their blood type is A+. Find the probability that the number of people who have A+ blood is

(a) Exactly 15,

(b) Less than 10, and

(d) Identify any unusual events. Explain.

Determine whether you can use a normal distribution to approximate the binomial distribution. If you can, use the normal distribution to approximate the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...