medium · GMAT Quant
A real estate analyst studies housing price variance across two submarkets. Submarket A contains 15 properties with a sum of squared price deviations from the mean equal to $180 million^2. Submarket B contains 45 properties with a sum of squared price deviations from the mean equal to $780 million^2. If both submarkets share the same average property price
What is the price variance for all 60 properties combined?
- 29.33 million^2
- 14.67 million^2
- 16 million^2
- 960 million^2
- 13.33 million^2
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?