Experiments, Sample Spaces, and Events

[sportywarbz]

An experiment consists of selecting a letter at random from the letters in the word MASSACHUSETTS and observing the outcomes. (Enter your answers using roster notation. Enter Ø for the empty set.)
(a) What is an appropriate sample space S for this experiment?
S =

Sample space...shouldn't the answer be {M,A,S,S,A,C,H,U,S,E,T,T,S}?

 

[tkhunny]

No point to listing duplicates multiple times.