Textbook ExpertVerified Tutor
26 Oct 2021
Given information
United Blood Services is a blood bank that serves more than hospitals in 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 of people have type O blood and of people have Rh- factor; of people have type O or Rh- factor.
Step-by-step explanation
Step 1.
Let and be two events, then we have
The events are denoted by
Event that person has type O blood,
Event that a person have Rh-factor.
Therefore,
,
,
and
.
We have to calculate the probability that a person has both type O blood and the Rh-factor, therefore using , we get
,
Substituting these values, we get
Hence, the probability that a person has both type O blood and the Rh-factor is .
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