```
```#mathsonamug #maths #Powerball pic.twitter.com/AgkojRcT3y

— Dr. Sean (@seanelvidge) January 14, 2016

Last nights Powerball lottery in the US was an incredible $1.5B! But what were the odds of winning? You need to get 5 numbers from a pot of 69 in the main draw, and then one ‘bonus’ ball, from a pot of 26. So the odds are 69 choose 5 multiplied by 26, which gives you the equation on the mug.