medium · GMAT Quant
A wastewater treatment plant monitors pollutant concentration C, in parts per million, governed by -6(C - 15) > -54 and -2(C - 10) ≤ -12.
Which of the following gives all acceptable values for C?
- 16 ≤ C < 24
- 16 < C ≤ 24
- C ≤ 16 or C > 24
- 16 ≤ C ≤ 24
- C < 24
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