In an office, 37 people prefer x drink, 32 prefer y drink and 41 prefer z drink. 5 people prefer all type of drink and 15 people prefer at least two type of drinks. If each of the people in office prefer at least one type of drink, then calculate the total no. of people in office.
The solution stated that at least 2 means 2 or more than 2. But the expression written for this purpose subtracts
2n(x intersect y intersect z)
Pl explain why 2n(x intersect y intersect z) is being subtracted
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Hope this information will clear your doubts about this topic.
If you have any doubts just ask here on the ask and answer forum and our experts will try to help you out as soon as possible.
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