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matrenka [14]
3 years ago
14

What is the number of ways to arrange 5 objects from a set of 9 different objects

Mathematics
1 answer:
luda_lava [24]3 years ago
7 0
\bf _nP_r=\cfrac{n!}{(n-r)!}\qquad 
\begin{cases}
n=9\\
r=5
\end{cases}\implies _9P_5=\cfrac{9!}{(9-5)!}
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