How many major drainage systems are there in new york state?

There is a total of 17 major watersheds or drainage systems in the New York State. The water coming from lakes, streams, higher geographical areas and rives goes to these 17 major drainage basins. Also the water coming form mountain, ridges and hills are collected into these network of basins.

The median is 4 because 2 x’s out 9, 3 x’s out 7, 3 x’s out 5, and 4 is the only remaining number.