100 students are boarding the hogwarts express! they all have allocated seats but the 1st wizard to board sits in the wrong seat
. each student then gets onto the train and takes their allocated seat if it’s available. if not, they pick a seat at random. what is the percent chance the last passenger will get his seat
6800 (6.8 * 10^3) divided by 1/12 (12^-1) equals 81600. It will take 81600 hours for the pool to completely empty at a rate of 0.833333333 or 12^-1 gallons per second.
