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The question asks to find the cardinality of the set \( A \), where \( A = \emptyset \) (the empty set). 

The cardinality of a set is the number of elements in that set. Since the empty set contains no elements by definition, its cardinality is \( 0 \).

The correct answer is: **0, as \(\emptyset\) is the empty set, which contains no elements**.

Would you like further clarification on the empty set or cardinality? Here are some related questions to deepen your understanding:

1. What is the difference between an empty set and a set with one element?
2. Can an empty set be a subset of another set?
3. How is the concept of the empty set used in real-world problems?
4. What is the cardinality of a set with multiple elements?
5. How do you represent the empty set in different contexts, such as in logic or programming?

**Tip:** In set theory, the empty set is denoted by \( \emptyset \) or \( \{\} \), and it is a subset of every set.

Find the cardinality of the set A, where A = ∅ (the empty set).

Understand how to find the cardinality of set A, where A is the empty set. Learn the concept of the empty set and its cardinality in set theory, suitable for students in grades 9-12.

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