In the given diagram, the circle stands for 'graduates'. the rectangle stands for 'school teachers'. and the triangle stands for 'married persons'. The numbers given in the different segments represent the number of persons in that category. How many school teachers are either graduates or married persons but NOT both?

22

the circle stands for 'graduates'

the rectangle stands for 'school teachers'

the triangle stands for 'married persons'

Step 1 ) Look at the figure of Triangle , circle and Rectangle

Step 2) Look at  number given in the figure as school teachers are either graduates or married persons but NOT both

Step 3) By visual observations we conclude that (15 + 7 = 22) is the number which represents school teachers are either graduates or married persons but NOT both