CR13.7 The following quote describing 18- to 29-yearolds is from the article “Study: Millennial Generation More Educated, Less Employed” (USA Today, February 23, 2010): “38%

have a tattoo (and half of those with tattoos have two to five; 18% have six or more).” These percentages were based on a representative sample of 830 Americans age 18 to 29, but for purposes of this exercise, suppose that they hold for the population of all Americans in this age group. Define the random variable x 5 number of tattoos for a randomly selected American age 18 to 29. Find the following probabilities:

a. Psx 5 0d

b. Psx 5 1d

c. Ps2 # x # 5d

d. Psx . 5d