# MAT - Paper 2010 - Q5

## Flashcards

If we have a date like

\[2d _ 2/0m _ 2/19y _ 3y _ 4\]
and the variables can be filled in with any values from $3, 4, 5, 6, 7, 8$, how can we work out the number of possibilities?

\[6P4\]

What is the formula for $nPr$?

\[\frac{n!}{(n-r)!}\]