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Recall the formula _n P_r = n!(n-r)!.
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To evaluate the given permutation, we will use the corresponding formula. _n P_r = n!/(n-r)! We are given that n= 9 and r= 5. Let's substitute these values into the formula.
n= 9, r= 5
Subtract term
Write as a product
Cancel out common factors
Multiply
