In the following diagram, the hexagon stands for 'librarians', the square stands for 'tax-payers', and the circle stands for 'painters'. The numbers given in the different segments represent the number of persons in that category.
How many librarians are NEITHER tax-payers NOR painters?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 15.
The number of librarians who are neither tax-payers nor painters = Number that is common to only hexagon = 15