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In a coffee shop, the number of coffees produced every hour is given below.
 
Hours \(1 - 3\) \(4 - 6\) \(7 - 9\) \(10 - 12\) \(13 - 15\) \(16 - 18\)
Number of coffee 19 5 4 13 20 10
 
Find the median hours of coffees produced.
 
Answer:
 
The median number of coffees produced is