1003029502

SubArea: 
Statistics
Level: 
A
Project ID: 
1003029502
Source Problem: 
2010018101
Accepted: 
1
Clonable: 
1
Easy: 
1
Two employees work in a factory workroom. The first one completed an assigned task in 20 minutes, the second one completed the same task in 10 minutes. We are interested in the average time of the task completion. What type of the average do we need to use?
Arithmetic mean
Harmonic mean
Geometric mean
Weighted arithmetic mean