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Sagot :
Answer:
- 3.33%
Step-by-step explanation:
- Cos of Pen = p
- Cos of Box = b
- b + p = 120
- 1.1b - 0.9p = 52
Solve the system by substitution:
- p = 120 - b
- 1.1b - 0.9(120 - b) = 52
- 1.1b + 0.9b = 52 + 108
- 2b = 160
- b = 160/2
- b = 80
Find p:
- p = 120 - 80 = 40
Total profit or loss:
- 80*1.1 + 40*0.9 - 120 = 4 (profit as positive)
Profit percent:
- 4/120*100% = 3.33%
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