11do you mean all 9- lettered words only ???
plz tell me if u do get da final ans. i know the type but somehow am missin out on one or da other case!!!!!!!!!!!!!
Find the total no of 9 lettered words dat can b formed using da letters of " HINDUSTAN"
such that neither of the foll 3 ordered arrangements appear : "hin" , "dus" & "tan"
i.e. the fol word not b considerd : "htadusinn"
hope u all get da que..........
ans : 169194
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12 Answers
21yaaa..... i forgot to tell dat
eg of valid case = " hidutnnas"
21Nice one abhirup!!!
Can u xpand a lil more...
y didnt u keep dividing by 2! in this protion : 5!)+7!-5!-5!+3!]
13no. of words
containing
HIN......7!
DUS but not HIN.....7!/2!-5!
TAN but not HIN or DUS... 7!-5!-5!+3!
21@ABHI
I GOT UR LOGIC.. COOL...
BUT Y DIDNT YOU DO 5!/2! IN DA 2ND CASE COZ n GETS REPEATED HERE AS WELL!!!!!
13DUS but not HIN.....7!/2!-5!
no.... Here we consider HIN, DUS,T,A,N as such five letters....so no repetition....hence only 5!....got it???