Exploring Permutations and Combinations in Mathematical ProblemsChapter 71160P1Find the number of possible ordered permutations when r items are selected from n available items.160P1=nPr=(n!)/(n-r!)Fill in the known values.(160!)/((160-1)!)Cancel out the common factorial factors.1602.7P0Find the number of possible ordered permutations when r items are selected from n available items.7P0=1Fill in the known values.(7!)/((7-0)!)=1
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