In a stationery shop, the price of a fountain pen is 60% more than the price of a notebook. The price of an eraser is 20% less than the price of a notebook. The total cost of one fountain pen, one notebook and two erasers is $42. Find the price of the fountain pen.
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Worked Solution
Step 1: Let the notebook price = N. Then the pen = 1.6N and the eraser = 0.8N.
Step 2: Total = pen + notebook + 2 erasers = 1.6N + N + 2(0.8N) = 1.6N + N + 1.6N = 4.2N.
Step 3: 4.2N = $42, so N = $10.
Step 4: Fountain pen = 1.6 × $10 = $16.
Answer: $16
Correct answer: $16
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