Study the following diagram and answer the question. How many educated people are not urban?
9
9 is correct.
In the diagram the triangle stands for employees, the circle for educated people and the rectangle for urban people. Each number tells how many people belong to that region.
Educated people are all the numbers inside the circle: 3, 2, 6 and 5. Of these, 2 and 5 lie inside the rectangle, so those people are urban.
The educated people who are not urban are the parts of the circle outside the rectangle: 3 (educated employees who are not urban) and 6 (educated only).
Total = \(3+6=9\). So 9 educated people are not urban.
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