Set of letter used in the word `CALCUTTA'
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Hmmm check explanation
Step-by-step explanation:
Calcutta has 8 letters, but there are 2 "C"s, 2"A"s and 2"T"s. If there were no duplicated letters, then there would be 8! ie 8x7x6x5x4x3x2x1 ways to arrange the letters. However we could swop each position where one "C" is for the other "C" and vice versa.
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{C,A,L,U,T}
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