GMAT Problem Solving
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Source: GWD
Level: 0
A salesperson received a 6-percent commission on the amount of total sales up to and including $10,000, and an r-percent commission on the amount of total sales over $10,000. If the salesperson received a total commission of $920 on total sales of $14,000, what was the value of r?
- A 3.2
- B 4.3
- C 6.6
- D 8
- E 9.2