The Venn diagram given below shows the artists in a Music School. The ‘Triangle represents ‘Pianists’: ‘Circle’ represents

The Venn diagram given below shows the artists in a Music School. The ‘Triangle represents ‘Pianists’: ‘Circle’ represents ‘Drummers’: the ‘Rectangle’ represents ‘Guitarist’ and the ‘square’ represents ‘Singers’. The numbers given in the diagram represents a number of persons of that particular category.

(a)          9

(b)          5

(c)           4

(d)          12

 Sol:

4 singers are also pianist and drummers but not Guitarist