In the following diagram the 'rhombus' stands for 'teachers', the circle stands for 'social servants', and the 'pentagon' stands for 'females'. The numbers given in the different segments represent the number of persons in that category.

How many female teachers are also social servants?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 10.
The number of female teachers who are also social servants = Number that is common to all three figures = 10