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A few questions (with answers and full explanations) for you, taken from APT's bank of 540 Interactive Multiple Choice Q&A's
Relate to:
Section 4.1- Individuals, Firms, Markets and Market Failure
4.1.5 - Perfect Competition, Imperfectly Competitive Markets and Monopoly Performance
To see details of our full bank of multiple choice questions for both AS and AL - see here
http://www.apt-initiatives.com/NEW_Specification