The prevalence of mild myopia (nearsightedness) in adults over age 40 is 25% in the U.S. Suppose

Question:

The prevalence of mild myopia (nearsightedness) in adults over age 40 is 25% in the U.S. Suppose four adults over age 40 are chosen at random from the population; let Y denote the number with myopia out of the four. Then the probability for Y is given by the following table:

(a) Find Pr{Y ‰¥ 3}
(b) Find Pr{Y ‰¤ 1}
(c) Find Pr{Y ‰¥ 1}

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...