Q. 45.0( 7 Votes )

In a group of 70

Answer :

A total number of people = 70.


Number of people liking Coffee = n(C) = 37.


Number of people liking Tea = n(T) = 52


Total number = n (C T) = 70


Person who likes both would be n(C T)


We know,


n (C T) = n(C) + n(T) – n (C T)


Substituting the values we get


70 = 37+52– n (C T)


70 = 89 – n (C T)


n (C T) =19.


There are 19 persons who like both coffee and tea.


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