RRB NTPC 28 April 2016 Paper

Directions (Q. 19-21): Read the passage given below and answer the questions that follow:
In a club of 30 people, all of them belong to at least one group - Chess, Drama and Art.
6 people belong only to the Art group.
5 people belong to all the three groups.
2 people have joined the Chess and the Art group but not the drama group.
15 people belong to the Art group.
2 people have joined only the Chess group.
3 people have joined only the Drama group.