Question

Out of 100 student in a class ,60 take tea ,40 take coffee and 25 take both.the number of student not taking either tea or coffee is

Answer 1

here T=tea and C=coffee
n(T)= 60
n(C)= 40
n(T∩C)=25

n(T∪C)=n(T) + n(C) - n(T∩C)
= 60+40-25
=100-25
=75
So there are 75 students who drink either tea or coffee out of 100 students

the number of students who drink neither coffee nor tea is=100-75 = 25