easy · GMAT Quant
A software company evaluates bug resolution times across two engineering groups. Group A resolved 30 bugs with a resolution time variance of 10 square hours. Group B resolved 70 bugs with a resolution time variance of 20 square hours. Assuming both groups have the exact same mean resolution time
What is the value of the combined sum of squared deviations from the mean for all 100 resolved bugs?
- 15.0
- 17.0
- 1,500.0
- 1,700.0
- 1,717.0
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