Hi,

10P3 is the notation used for finding 'Permutation' Results

 10P3 = 10!/(10-3)! = 10!/7! = 10*9*8 = 720

For example: the ways of electing a President, Treasurer, Secretary 

out of group of 10 people is 720 ways it could be done.

Permutations used when 'order' of choices is important.



10C3 for example is used when the exact order of the 3 chosen is not important.

 10C3 =  = 120 ways 3 people can be chosen from a group of 10 

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