medium · GMAT Quant
A factory produced 18,420 units in Year 1 with an estimated defect rate of 2.8%, and 23,150 units in Year 2 with an estimated defect rate of 4.1%. Using the approximation that unit counts should be rounded to the nearest 1,000 and defect rates to the nearest whole percent, estimate how many more defective units occurred in Year 2 than in Year 1.
- 400
- 420
- 380
- 340
- 360
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