The blood groups of 200 people are distributed as follows: 50 have type A blood, 65 have a B blood type, 70 have the O blood type and 15 have type AB blood. If a person from this group is selected at random, what is the probability that this person has an O blood type?
A. 0.35
B. 0.25
C. 0.45
D. none of the above
Answer:A
The blood groups of 200 people are distributed as follows: 50 have type A blood, 65 have a B blood type, 70 have the O blood type and 15 have type AB blood. If a person from this group is selected at random, what is the probability that this person has an O blood type?
A. 0.35 B. 0.25 C. 0.45 D. none of the above