Q. 24.0( 38 Votes )

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Answer :

Given: n(A) = 80, n(B) = 60 and n (A B) = x = 20

Total number of students = 125


n(A) = number of students who drink tea


n(B) = number of students who drink coffee


n (A B) = number of students who drink both tea and coffee


n (A B) = number of students who drink either tea or coffee


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As we know, n (A B) = n(A) + n(B) - n (A B)


n (A B) = 80 + 60 - 20


n (A B) = 140 - 20


n (A B) = 120


Then, the number of students who do not drink tea or coffee = 125 – 120


= 5


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