A car travels along a certain road at an average speed of 
and returns along the same road at an average speed of 
.Calculate the average speed for the round trip.
Definitions:
Median
The middle value in a sorted, ascending or descending, list of numbers.
Frequency Distribution
A statistical representation showing how often various outcomes occur within a set of data, often displayed as a table or graph.
Data Set
A collection of related data points that are treated as a single unit for processing and analysis.
Frequency Distribution
a statistical representation showing the number of observations within a given interval.
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