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Show that the set of letters needed to s...

Show that the set of letters needed to spell “CATARACT” and the set of letters needed spell “TRACT” are equal.

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The set formed by distinct letters of the word "CATARACT" are {C, A, T, R}. The set fomed by distinct letters of the word "TRACT" are {T, R, A, C}
Hence the two set are equal.
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