easy · GMAT Quant
Pylon Grid first combines 21 cartons averaging 41 with 15 averaging 107. That mixture is then combined with 11 cartons averaging 113. A leftover sample from last week is not part of this mix.
What is the first-stage combined average, before the third pool is added?
- 90
- 78
- 68
- 113
- 52
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