Monday 24 December 2012

Probability theory and caffeine

In mathematics, the Law or Rule of Nine states that any positive integer is divisible by nine only if the the sum of its digits is also divisible by nine. For example, 72 (7 + 2 = 9) or 108 (1 + 0 + 8 = 9) or 396 (3 + 9 + 6 = 18).

In Tenseworld, at least this past week, the Rule of Nine states that during any visit to a coffee house where food is ordered, the number placed on your tray (to indicate to the barista where to serve your order) will be nine.

This happened three separate times (between two different coffee houses and on three separate days). What are the chances of that?

And none of them were for cake or biscuits. Those odds just keep lengthening!

Stop press: Just checked my post list and that was blogpost 333. Gulp!


holdingmoments said...

I think you need to rest a bit over Christmas.
Have a good one.

Imperfect and Tense said...

Or at least consume less caffeine, perhaps?

All the best to you too.