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For this assignment Permutations are used to make life easy and simple.

The basic equation for a Permutation is

$ P(n,r) = \frac{n!}{(n-r)!} for 0 <=r<=n $

a) 8!

b) 2*7!

c) 2*4!*4!

d) 5!*3!*3

e) 4*2!*4!


Q's: Do you understand how I got these answers?
     Do you think the answers are correct?
     What is the probability I would post an incorrect answer on purpose?

Alumni Liaison

Correspondence Chess Grandmaster and Purdue Alumni

Prof. Dan Fleetwood