A-LevelEconomicsBasic Economic IdeasFeb/Mar 2018Paper 1 Q21 Mark
A farmer is able to grow three crops, X, Y and Z, on his land. The farmer decides to grow at most two crops in any year. The table shows six possible combinations of units of output of the three crops. output X 0 0 80 40 40 0 Y 0 60 0 30 0 30 Z 40 0 0 0 20 20 What is the opportunity cost of 1 unit of X?
A1.33 units of Y
B1.5 units of Y
C0.5 units of Z
D2.0 units of Z
✓ Correct Answer
The correct answer is C: 0.5 units of Z
📋 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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