Cardinality and Set Operations: A Journey into the World of Infinite Sets

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Multiple Choice

Which of the following sets has a cardinality of (\aleph_0)?

  1. The set of all natural numbers (\mathbb{N})
  2. The set of all real numbers (\mathbb{R})
  3. The set of all even integers (2\mathbb{Z})
  4. The set of all prime numbers (\mathbb{P})
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