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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 to spell " TRACT" are equal.

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Let .X. be the set of letters in "CATARACT". Then .X={C, A, T, R}. Let .Y. be the set of letters in "TRACT". Then .Y=T, R, A, C, T=T, R, A, C.
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V PUBLICATION-SETS-QUESTION BANK
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