Final answer:
The probability that two randomly chosen people from a population have the same blood type depends on the distribution of blood types in that population. To find the probability, multiply the percentages of each blood type together. To find the probability that a person does not have both blood types, subtract the probability of having both from 1.
Step-by-step explanation:
The probability that two randomly chosen people from a population have the same blood type depends on the distribution of blood types in that population. If the distribution of blood types is known, the probability can be calculated.
To find the probability that a person has both type O blood and the Rh- factor, you need to know the percentage of people who have type O blood and the percentage of people who have the Rh- factor. Multiply these percentages together to get the probability.
To find the probability that a person does not have both type O blood and the Rh- factor, subtract the probability of having both from 1.