Maths of the Day: Rachel Riley on the maths of the FA Cup final

Countdown star Rachel Riley looks at the maths behind the FA Cup final in the latest of the Maths of the Day series.

Will it be Arsenal or Aston Villa who climb the 107 steps and lift the FA Cup trophy on Saturday?

Only 43 teams have ever won the famous competition, including both this years finalists, and just 11 have successfully defended the title - can holders Arsenal become the 12th?