Discussion
David prefers Economics to Maths, English to Social science, and Political Science to History. If she prefers Maths to History, and Social science to Maths, which is David’s least preferred subject?
Answer: A
Correct answer: History
Chain the preferences together. Social science is preferred to Maths and Maths to History, and English is preferred to Social science, giving English above Social science above Maths above History. Economics is above Maths and Political Science above History. Nothing is placed below History, so it is the least preferred.
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