Two Basic Rules of Probability · Exercise 28
United Blood Services is a blood bank that serves more than 500 hospitals in 18 states. According to their website, a person with type O blood and a negative Rh factor (Rh–) can donate blood to any person with any bloodtype. Their data show that 43 percent of people have type O blood and 15 percent of people have Rh– factor; 52 percent of people have type O or Rh– factor.
(a) Find the probability that a person has both type O blood and the Rh– factor.
(b) Find the probability that a person does not have both type O blood and the Rh– factor.
OpenStax, Statistics · §3.3 Two Basic Rules of Probability · Exercise 28
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