Question 35
HardOriginal questionA fruit seller spends ₹600 on apples at ₹120 per kg and another ₹600 on apples at ₹80 per kg. What is the average cost per kg of all the apples she bought?
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
At ₹120 per kg, ₹600 buys 5 kg; at ₹80 per kg, ₹600 buys 7.5 kg.
Total: ₹1,200 for 12.5 kg.
Average cost = ₹ = ₹96 per kg.
Worth noting
Averaging the prices to get ₹100 is the trap: equal MONEY buys more of the cheaper apples, so the average leans towards ₹80.
- Concept
- Average price when equal money, not equal weight, is spent
- Typical timeTypical
- 100 s
- Your timeYours
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