Observe the following diagram and answer the question that follows.

Find the number of students who study two or more subjects.

13

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

Step 2) Look at  number given in the figure as the number of students who study two or more subjects.

Step 3) By visual observations we conclude that (4 + 3 + 5 + 1 = 13)  is the number which represents the number of students who study two or more subjects.