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Example:
In a class of 80 boys, there are 60 boys who play rugby and 35 play tennis. Use Venn diagrams to show how many boys play both the games? How many play rugby only and how many play tennis only?
Suggested answer:
n(T) = number of boys who play tennis
Let x = number of boys who play both the gamesFrom the above diagram it is clear that,
Those who play rugby only = 60 - x = 60 - 15 = 45
Those who play tennis only = 35 - 15 = 20To find:
