Permutations and Factorials

[kimmy_koo51]

How many different 'words' can you make using all the letters of the world MISSISSIPPI if
(A) there are no restrictions
(B) the word must end in an I
(C) the word cannot end in an I

Solution:

(A) 11! / 3!2!3!3! = 34650

(B) I have no idea where to begin

(C) Ditto

 

[crb]

(10!) / [ (3! *4! * 2! )]...........i think....this is for B

 

[crb]

u might have A incorrect.........i think it should be 11! / ( 4! * 4! * 2!) .......as 4 i , 4 s ans 2 p..........

 

[crb]

for ans to C ............it must be (Ans A - Ans B)