The number of permutations of r objects taken from a set of n objects is `nPr = P(n, r) = (n!)/((n - r)!)`

`10P10 = (10!)/((10 - 10)!)`

= `(10!)/1`

= `10!`

= 3628800

**The value of 10P10 is 3628800**

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