easy · GMAT Quant
A retail manager reviews daily sales variation across two store locations. Store 1 analyzed 12 daily records with a variance of 12 square units, where variance equals the sum of squared deviations divided by record count. Store 2 analyzed 18 daily records with a variance of 12 square units under the same calculation.
What is the combined sum of squared deviations for all 30 records?
- 12
- 24
- 360
- 400
- 720
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Including both endpoints, how many distinct integer price points are in this range?
- Which of the following expressions must result in a positive value?
- Which property of arithmetic justifies that first step?
- Which of the following must also be an even integer?
- Which of the following inequalities correctly represents this range?
- Which of the following includes the number 0?
- How many unique meal combinations can a customer create?
- What is the probability that the lightbulb is functional?