medium · GMAT Quant
A fleet management system bounds vehicle operational speed S, in miles per hour, according to -4(S - 65) ≥ -40 and -3(S - 50) < -15.
Which of the following gives all valid speed ranges for S?
- 55 < S ≤ 75
- 55 ≤ S < 75
- S < 55 or S ≥ 75
- 55 < S < 75
- S ≤ 75
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