Considering the chart below, what is the probability that if you select one person at random that they have committed a violent crime and were at least 20 years of age? 
Definitions:
Sickle-cell Anemia
A genetic blood disorder caused by a recessive gene where red blood cells assume an abnormal, rigid, sickle shape, causing blockage in blood flow and pain.
Oxygen
A chemical element essential for most forms of life on Earth, commonly utilized in cellular respiration.
Infertility Problems
Issues or conditions that impair the ability of an individual or couple to conceive after a year or more of regular sexual intercourse without contraception.
Sperm
Male reproductive cells that are necessary for fertilization of the female ovum.
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