AlgebraEasy–MediumNumber sold from a per-item profit
Algebra practice question
A stationer buys pens for $1.50 each and sells them for $2.25 each. How many pens must be sold to make a total profit of $60?
Answer: 80
Profit per pen is 2.25 − 1.50 = 0.75. Then 0.75n = 60 → n = 80.
Common wrong answers
- If you answered 40
- 40 comes from 1.50n = 60, using the cost instead of the profit.
- If you answered 45
- 45 is 60 × 0.75, multiplying instead of dividing.
- If you answered 26.67
- 26.67 comes from 2.25n = 60, using the selling price.
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