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1. Find the value of 5 Permutations of set with 9 elements

2.In how many ways can set of five letters be selected from the english alphabet

WITH SOLUTION .... THANKS

Guest Mar 2, 2015

Best Answer 

 #1
avatar+17721 
+5

1)  Permutation of 9 items, 5 at a time:  9P5  =  9! / 4!  =  9x8x7x6x 5  =  15120.

2)  If order is important:  26P5          (If you want just a set, order isn't important.)

     If order is not important:  26C5

geno3141  Mar 2, 2015
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1+0 Answers

 #1
avatar+17721 
+5
Best Answer

1)  Permutation of 9 items, 5 at a time:  9P5  =  9! / 4!  =  9x8x7x6x 5  =  15120.

2)  If order is important:  26P5          (If you want just a set, order isn't important.)

     If order is not important:  26C5

geno3141  Mar 2, 2015

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