2002 · Q60
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?
General Mental Ability, Quantitative Aptitude and StatisticsElementary statistics
- A27
- B20
- C25
- D11
Explanation
Tea-only = 9, and total tea-drinkers = 16, so both tea and coffee = 16 − 9 = 7. On the standard reading that everyone in the group takes at least one of the two, coffee-only = 36 − 9 − 7 = 20. Hence (B) is correct.