If one of the 991 people is randomly selected, find the probability that the person is a man or a heavy smpker
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To find the probability that the randomly selected person is a man or a heavy smoker, we need to know the number of men and the number of heavy smokers among the 991 people. Once we have this information, we can calculate the probability.
To find the number of men, you would need the data or information about the proportion of men in the group. For example, if you know that 45% of the 991 people are men, you can calculate the number of men by multiplying 991 by 0.45. Let's assume there are 446 men.
Similarly, to find the number of heavy smokers, you would need data or information about the proportion of heavy smokers in the group. If you know that 10% of the 991 people are heavy smokers, you can calculate the number of heavy smokers by multiplying 991 by 0.1. Let's assume there are 99 heavy smokers.
Now that we have the number of men (446) and the number of heavy smokers (99), we can calculate the probability.
Probability of being a man = Number of men / Total number of people = 446 / 991
Probability of being a heavy smoker = Number of heavy smokers / Total number of people = 99 / 991
To find the probability that the person is a man or a heavy smoker, we can add the probabilities together:
Probability of being a man or a heavy smoker = Probability of being a man + Probability of being a heavy smoker
Please note that this calculation assumes that being a man and being a heavy smoker are independent events. If there is data or information on the relationship between being a man and being a heavy smoker (e.g., the percentage of men who are heavy smokers), the probability calculation would be more complex.