medium · GMAT Quant
A retail chain sold two models of laptops during a promotional event. Model A sold 30 units at an average sale price of $500. Model B sold x units at an average sale price of $900. If the average sale price across all laptops sold of both models combined was $750
What is the value of x?
- 50
- 30
- 80
- 18
- 60
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