In a group of 36 persons, a total of 16 take tea while 9 take tea but not coffee. How many persons in this
group take coffee but not tea?
(a) 27
(b) 20
(c) 25
(d) 11
Answer: 20
In a group of 36 persons, a total of 16 take tea while 9 take tea but not coffee. How many persons in this group take coffee but not tea?
