In the given diagram, the shapes indicate the categories of persons. The numbers given in the different segments represent the number of persons in that category.
How many dancers are either gymnasts or singers but NOT both?

Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 19
Number of dancers who are gymnasts but not singers = 7 + 3 = 10
Number of dancers who are singers but not gymnasts = 9
The number of dancers who are either gymnasts or singers but not both = 10 + 9 = 19
Hence, the correct answer is Option 4.