2010018101

SubArea: 
Statistics
Level: 
A
Project ID: 
2010018101
Source Problem: 
1003029502
Accepted: 
0
Clonable: 
1
Easy: 
1
Andrea took part in a children's cycling race. The first part of the route led from the Lower Square to the Upper Square and Andrea completed it with an average speed of 10km/h. Returning from the Upper Square to the Lower Square she rode the same route with an average speed of 13km/h. We are interested in her average speed during the whole race. What type of average do we need to use?
Harmonic mean
Arithmetic mean
Geometric mean
Weighted arithmetic mean