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For instance, if a vehicle travels a certain distance d outbound at a speed x (e.g. 60 km/h) and returns the same distance at a speed y (e.g. 20 km/h), then its average speed is the harmonic mean of x and y (30 km/h), not the arithmetic mean (40 km/h). The total travel time is the same as if it had traveled the whole distance at that average speed.
The Guelaguetza (/ ˌ ɡ ɛ l ə ˈ ɡ ɛ t s ə /; Spanish: [ɡelaˈɣetsa]), also known as Los lunes del cerro ('Mondays on the Hill'), is an annual indigenous cultural event in Mexico that takes place in the city of Oaxaca, capital of the state of Oaxaca, and nearby villages. The celebration features traditional costumed dancing by gender ...
The weighted arithmetic mean is similar to an ordinary arithmetic mean (the most common type of average), except that instead of each of the data points contributing equally to the final average, some data points contribute more than others.