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Cardinal Properties

If A = x : x ...

Question

If $A = {x : x$ is a letter in the word 'QUARANTINE' $}$ , then the cardinality of $A$ is

5

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6

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7

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8

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Solution

The correct option is D $8$
$A = {A, E, I, N, T, Q, R, U} \Rightarrow n (A) = 8$

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