A-LevelEconomicsDemand and SupplyOct/Nov 2018Paper 1 Q111 Mark

Goods X and Y are complements and have upward-sloping supply curves. What will be the effect on the equilibrium price and quantity of good X of an increase in the supply of good Y? [Table: quantity of X, price of X A decrease decrease B decrease increase C increase decrease D increase increase]

Q: What topic does this question test?

This question tests Demand and Supply in A-Level Economics (syllabus code 9708). It is worth 1 mark.

Aquantity of X: decrease, price of X: decrease

Bquantity of X: decrease, price of X: increase

Cquantity of X: increase, price of X: decrease

Dquantity of X: increase, price of X: increase

✓ Correct Answer

The correct answer is D: quantity of X: increase, price of X: increase

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Economics Question

Topic

This multiple-choice question tests Demand and Supply in A-Level Economics (syllabus code 9708). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Economics Oct/Nov 2018 examination, Paper 1 Variant 2.

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