A businessman purchased some notebooks for ₹960. If he had bought 8 more notebooks for the same amount, the cost of each notebook would have decreased by ₹4. What was the original number of…
Question and options
A businessman purchased some notebooks for ₹960. If he had bought 8 more notebooks for the same amount, the cost of each notebook would have decreased by ₹4. What was the original number of notebooks purchased?
- 30
- 48
- 40
- 45
Answer and explanation
Correct answer: C - 40
960/n - 960/(n+8) = 4 gives n(n+8) = 1920. n = 40 works (40 x 48 = 1920), with price Rs 24 vs Rs 20 for 48 notebooks.
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