Example 23 Show that the set of letters needed to spell “ CATARACT ” and the set of letters needed to spell “ TRACT” are equal. Let X be the set of letter in “CATARACT”. ∴ X = {C, A, T, R} Let Y be the set of letter in “TRACT”. ∴ Y = {T, R, A, C} Since every element of X and Y are equal Hence, X = Y

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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