Ceiling Fan Wiring Confusion
The 2 black + 1 white is your always-hot bundle.  You won't use it (unless you want to power the fan 24x7 and use a remote on it). 

The 2 white is the neutral bundle.  Your fan will need that. 

The loose black is the switched-hot from the switch. (it is the partner wire to the oddball white from above).  This is the switched-hot for the fan.  

The switch is a switch loop, meaning power comes to the fan (and also goes onward to serve other things)... and the switch merely gets always-hot and switched-hot.  It was legal to wire switches that way as recently as 2011.  The white could be a real source of confusion, since it's not a neutral, so two special rules apply: #1 the always-hot wire must be white (to make it more obvious that it's not a neutral to people probing it with voltage testers), and #2 the white wire must be marked with black tape or paint to indicate it's a hot.  

Without that marking, which was overlooked in your box, it is impossible to distinguish a switch loop from other wires.  So it is most important you don't allow the 2 black + 1 white to become separated/confused. It is common for important information like this to only exist in wire position. This is why I own 10 colors of tape.