A woman was accused of killing someone in her town due to a blood type match. The blood type is a rare variant that is present only in 0.1% of the entire population. If the population of her town is 5,000, what are the chances that she is the killer?Group of answer choices0.16660.510.010.10.2
Question
A woman was accused of killing someone in her town due to a blood type match. The blood type is a rare variant that is present only in 0.1% of the entire population. If the population of her town is 5,000, what are the chances that she is the killer?Group of answer choices0.16660.510.010.10.2
Solution
The question is asking for the probability that the woman is the killer based on the blood type match. Here's how you can calculate it:
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First, find out how many people in the town have the same rare blood type. Since the blood type is present in 0.1% of the population, and the population of the town is 5,000, you multiply 5000 by 0.001 (which is the decimal equivalent of 0.1%). This gives you 5 people.
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The woman is one of these 5 people. So, the probability that she is the killer, based only on the blood type match, is 1 out of 5, or 0.2.
So, the answer is 0.2.
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