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Hello.
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So here in this question, we have in a survey of 100 outpatients who reported being at the hospital for the day, it was filed at 70 complained of a fever, 50 had stomach troubles, and 30 were injured.
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So the entire 100 patients had one or more of the complaints, and 44 had exactly two of them, were asked how many patients had all of the three complaints? well, here, if we let you be the set of patients who reported, to get the hospital for the day.
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F be the set of patients who complain to fever.
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S be the set of patients who have stomach troubles, and i be the set of injured patients.
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Then from a given data, we have that n of the universal set is equal to n of f, union, s, union i, which is equal to 100...