in a group of 26 person 8person take tea , instead of coffee and 16person take tea . How many persons take only coffee and not tea
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T= persons drinking tea
C =persons drinking coffee
n(T∪C)=26
8 take Tea but not Coffee =n(T∩
C
ˉ
)=8,
people who take Tea =n(T)=16
people take coffee but not tea =n(
T
ˉ
∩C)=n(T∪C)−n(T)=26−16=10
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