medium · GMAT Quant
An algorithm evaluates prediction error across two server clusters running identical benchmark tasks with equal mean latency. Cluster 1 recorded a population variance of 25 ms^2 across 40 executions. Cluster 2 recorded a population variance of 40 ms^2 across 60 executions.
What is the overall population variance across all 100 executions?
- 32.5
- 34.0
- 34.34
- 35.86
- 65.0
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?