Scarcity, Choice and Opportunity Cost
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Lesson overview
The foundation every later Economics topic builds on.
Go to lesson quiz →Exam guidance · JAMB UTME Speed Lens
Pacing
~40 seconds per MCQ (180 questions in 120 minutes, no negative marking).
How JAMB marks this
Fast dimensional/sign elimination and standard formula shortcuts — skip multi-line algebra when substitution tests options faster.
Watch out for
UTME distractors routinely include the intermediate value (e.g., forgetting to convert cm³ to dm³ or °C to Kelvin).
Lesson content
Overview — Scarcity, Choice and Opportunity Cost
The foundation every later Economics topic builds on. This lesson is at the beginner level — by the end, you'll be able to recognise this question type, apply a reliable method, and avoid the traps that cost marks.
Key Concept
Economics is the study of how individuals and societies allocate SCARCE resources to satisfy UNLIMITED wants. Because resources are scarce, every choice involves an opportunity cost — the value of the next-best alternative given up.
Why It's Tested This Way
This is the very first concept WAEC/JAMB test because it is the foundation of the entire subject — every later topic (production, pricing, trade) is ultimately about how scarcity forces choices.
Method
To find opportunity cost in a question, identify what was actually chosen, then identify the single NEXT-BEST alternative that was given up — not just any alternative, but specifically the best one foregone.
Worked Example
Worked example: A farmer with one plot of land can grow either maize or yam, not both. If he chooses maize, the opportunity cost of that choice is the yam he could have grown instead.
Second Worked Example
Second worked example: A student with ₦5,000 who spends it on textbooks instead of a phone accessory has an opportunity cost equal to the value/satisfaction the phone accessory would have given — not the ₦5,000 itself, but what it could have bought.
Common Traps
Common trap: confusing opportunity cost with the MONETARY cost of a choice — opportunity cost is the next-best alternative FOREGONE, not simply the price paid.
Lesson Summary
Remember: (1) identify what is being asked, (2) apply the JAMB strategy, (3) check against the traps. Complete the 10-question quiz below to unlock the next lesson — you need at least 60% to pass.
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