By Karl Smallwood – TodayIFoundOut.com
Although the task of determining how many people attend something as large as say, a political rally or a protest may seem like a daunting, almost impossible undertaking to do with any accuracy, with some basic information, it’s actually not that difficult to get reasonably accurate results.
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Source:: http://feeds.gawker.com/~r/gizmodo/full/~3/Gcdv1rHc5qw/how-do-people-estimate-crowd-sizes-1655862873
