# MAT - Paper 2010 - Q5

> Source: https://ollybritton.com/notes/maths/problems/mat/2010/q5/ · Updated: 2021-08-04 · Tags: maths, mat, notes

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

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