Question
In a group of 36 persons, a total of 16 take tea while
9 take tea but not coffee. How many persons in this group take coffee but not tea?Solution
There are total 36 persons. 9 persons take Tea but not coffee (it means only tea) Total persons who take tea (only Tea + both tea and coffee) = 16. So, persons who take both coffee and tea = 16- 9=7. So, persons who take coffee but not tea (only coffee) = total - only tea - both tea and coffee =36-9-7= 20
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