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