medium · GMAT Quant
A retail merchandise manager evaluates pricing variance across two categories, Apparel and Footwear. Both categories have the same average price of $60. Apparel includes 25 items with a variance of 140.0, and Footwear includes 75 items with a variance of 60.0.
What is the combined population variance of prices across all 100 items?
- 60.0
- 80.0
- 100.0
- 200.0
- 8,000.0
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