GoF CH 4-6 post DH look

[pippin_999]

No: HPFGUIDX 181754

> Montavilla47:
> 
> Are you mad, Alla?  Nonsense?  Cauldron leakings is a serious 
> business!  Just consider that there are approximately 300 
> potions students  at any one year  in Snape's classroom.  They use
> their cauldrons at least once a week, which is say, 40 times a year.
> That's a 12,000 cauldron uses per year
> 
> At a 3% accident rate, that's 360 accidents a year, just in 
> the classroom, to say nothing of the accidents that take place in
> homes, apothecary shops, hospitals, and factories.

Pippin:
Er, wait. The *failure* rate is increasing at 3% a year, not the
overall number of cauldron failures. That is, if 100 cauldrons failed
last year, 103 failed this year. But that's 103 cauldrons total, not
three more cauldrons out of every hundred. See?


Pippin