EXERCISE 4 (a) 100 people were asked how they prepare their food. Three methods were identified: using an oven, using a microwave oven and using a brati. The resulis were as follows: - 110 people use an oven, 95 people use a microwave oven and 38 people use a braai. - 50 people use an oven and a microwave oven. - 30 people use an oven and a brasi. - 25 people use a microwave oven and a braai. (1) Represent this data on a Venn diagram. (2) How many of these people do not use any of these three methods to prepare (3) A person is selected randomly from the group. What is the probability that thi:

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To represent the data on a Venn diagram, we use the following values: $$ |A| = 110 $$, $$ |B| = 95 $$, $$ |C| = 38 $$, $$ |A \cap B| = 50 $$, $$ |A \cap C| = 30 $$, $$ |B \cap C| = 25 $$. The number of people not using any method is $$ y = -38 - x $$, where $$ x $$ is the number of people using all three methods. The probability of selecting a person who uses a specific method is calculated using the formula $$ P(	ext{using a specific method}) = \frac{	ext{Number of people using that method}}{	ext{Total number of people}} $$.

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