medium · GMAT Quant
A quality control supervisor monitors a chemical process where the operating temperature T in degrees Celsius must satisfy the compound inequality -12 ≤ -3T + 15 < 33.
Which of the following intervals represents all permissible values of T?
- -6 < T ≤ 9
- -6 ≤ T < 9
- -9 ≤ T < 6
- -6 < T < 9
- T < -6 or T ≥ 9
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