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For R = {x : x is a letter occurring in the word KITE}, what is n(R)?

Answer and explanation

Correct answer: 4

The set R contains the distinct letters appearing in KITE: K, I, T, and E. The notation n(R) means the cardinality, or number of distinct elements, of R. Since no letter is repeated, the count is 4, so option B is correct. The answer is not 3 or 2 because those omit letters, and it is not 5 because the word contains only four different letters.

Related tags

SetsCardinalityDistinct-Elements

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