A Venn diagram is a way of grouping different ... we are interested in at that particular time. There’ll be circles inside the box which we use to group the items within the universal set.

4 + 6 + 8 = 18, the Venn diagram only shows the data of 18 people. Assuming that the given data is correct, there should be 2 people placed inside the rectangle and outside the circles who do not ...