easy · GMAT Quant
A materials testing laboratory measures tensile strength variation across two material samples. Sample 1 consists of 16 specimens with a variance of 9 square megapascals. Sample 2 consists of 24 specimens with a variance of 16 square megapascals. Variance is defined as sum of squared deviations divided by specimen count.
What is the combined sum of squared deviations across all 40 specimens?
- 12.5
- 25
- 500
- 528
- 1000
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