AMU Engineering 2019 solved paper Solved Paper

Total drink =3 (i.e., milk, coffee, tea).
10 students take all 3 drinks
i.e. n(M∩C∩T)=10 Only 20 students take milk and coffee
i.e., n(M∪C)=20
and 30 students take coffee and tea
i.e., n(C∪T)=30
and 25 students take milk and tea
i.e., n(M∪T)=25
12 students take milk only
i.e., n(M)=12
5 students take coffee only
i.e., n(C)=5
and 8 students take tea only
i.e., n(T)=8
Total number of students who take any of the drink is 80 .
∴ The number of students who did not take any of three drinks =100−80=20