how many different ways can a visiting nurse visit 9 patients if she wants to...?

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Aromer

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It says how many different ways can a visiting nurse visit 9 patients if she wants to visit them all in one day?
I am not sure if I should use the fundamental rule, permutation rule, or combination rule. Please help!!!
 
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Aromer said:
It says how many different ways can a visiting nurse visit 9 patients if she wants to visit them all in one day?
I am not sure if I should use the fundamental rule, permutation rule, or combination rule. Please help!!!
Click to expand...

Assign numbers to the patients (1 - 9).

How many ways can you arrange those numbers?
 
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