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Probability

quaidy4

New member
Joined
Jan 19, 2011
Messages
15
a 4-letter word is to made using letters from the set (a,b,c,d,e,f) How many words are possible assuming that

a)there are no restrictions
b) no repetition of letters is permitted
c) adjacent letters in the word may not be the same?

I think for a it is 6!
b) 6 times 5 times 4 times 3

c) 6 times 5 to the power of 3
 

pka

Elite Member
Joined
Jan 29, 2005
Messages
7,688
quaidy4 said:
a 4-letter word is to made using letters from the set (a,b,c,d,e,f) How many words are possible assuming that
a)there are no restrictions
b) no repetition of letters is permitted
c) adjacent letters in the word may not be the same?

I think for a it is 6!
b) 6 times 5 times 4 times 3 CORRECT

c) 6 times 5 to the power of 3 CORRECT
a) should be \(\displaystyle 6^4\)
 

quaidy4

New member
Joined
Jan 19, 2011
Messages
15
thank you so much! :)
 
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