The blood groups of 200 people is distributed as follows: 50 have type A blood, 65 have B blood type, 70 have O blood type and 15 have type AB blood. If a person is selected at random, what is the probability that this person has AB blood type?
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Step-by-step explanation:
Number of people have blood group A: 50
Number of people have blood group B: 65
Number of people have blood group O: 70
Number of people have blood group AB: 15
Total people: 200
Required probability:
P=
200
70
=
20
7
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