Q. 64.0( 56 Votes )

In a group

Answer :

Let T be the set of people who like Tea,


and C be the set of people who like Coffee.


Number of people who like Tea = n(T) = 52


Number of people who like Coffee = n(C) = 37


Number of people who like at least tea or Coffee = n(T C ) = 70


Number of people who like both tea and Coffee = n(T C )


We know that-


n(T C) = n(T)+ n(C) - n(T C)


70 = 52+37 - n(T C)


70 = 89 - n(H E)


n(H E) = 89-70


n(H E) = 19


Thus, 19 people like both Tea and Coffee.


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