Question 1082578
How many distinct ways can the letters in the word ITEMS be arranged? 
5! = 120, as the other tutor stated.
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How many distinct ways can the letters in the word STEMS be arranged? 
5!/2 = 60.
It's divided by 2 because 2 letters are the same.
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How many distinct ways can the letters in the word SEEMS be arranged? 
5!/4 = 30
It'd divided by 2 twice because there are 2 duplicate letters.