SOLUTION: Using all ten letters of the word “thermastar”, how many DISTINCT ways can these letters be arranged?

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Question 459633: Using all ten letters of the word “thermastar”, how many DISTINCT ways can these letters be arranged?
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

number of t-> 2, r->2, a->2 and other letters are single.
number of possible words = 10!/[2!*2!*2!]
= 453600