### Comment:
Bahahahhajajahhahah  
 Statistics and probability with germs on a McDonald’s touchscreen used for orders and doors? 
  
 I’ll bite.  
  
  
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 Do all people order? Do all people open the door? Let’s use four families of various size. Go.

### REPLY:
You seem to be asking for a dissertation, which I don't have time to do alongside all my actual work. The simple answers are 'no' and 'no'. Realistically those families are in their vehicles ordering in the drive-thru while grasping their filthy steering wheels.

### END.