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Hello! I need some reassurance on the top question please

Hello! I need some reassurance on the top question please-example-1

1 Answer

2 votes

SOLUTION


^7P_4

Therefore,


\begin{gathered} nPr=(n!)/(\left(n-r\right)!)=(7!)/(\left(7-4\right)!)=(7!)/(3!)=(7*6*5*4*3!)/(3!)=7*6*5*4=840 \\ \end{gathered}

Hence, the answer is 840 arrangements.

User Koes Bong
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