10 Questions
What is the cardinality of a set representing the number of days in a week?
7
If Set A represents the set of even numbers from 1 to 10, what is the cardinality of Set A?
5
What symbol is used to represent cardinality?
n(A)
What is the cardinality of the set of prime numbers between 1 and 20?
8
If Set B represents the set of multiples of 3 from 1 to 30, what is the cardinality of Set B?
10
Which of the following is the correct way to represent the cardinality of a set?
All of the above
What is the cardinality of the set of odd numbers between 1 and 15?
9
If Set A = {2, 4, 6, 8, 10} and Set B = {1, 3, 5, 7, 9}, what is the cardinality of the union of Set A and Set B?
15
If Set C represents the set of factors of 24, what is the cardinality of Set C?
6
What is the cardinality of the set of perfect squares between 1 and 100?
12
Study Notes
- Cardinality refers to the number of elements in a given set and is represented by the symbol "n" enclosed in parentheses with the set name in capital letters.
- Example: Set A, representing primary colors like yellow, red, and blue, has a cardinality of 3.
- Another example: Set B, representing school days in a week (Monday to Friday), has a cardinality of 5.
- Cardinality in counting techniques is essential for determining the number of elements in a set.
- The cardinality of an empty set should be indicated as 0, not as an empty set or null set.
- Example: The set of days in a week has a cardinality of 0 because there are no elements.
- Various examples are provided to calculate the cardinality of sets based on different criteria like prime numbers, even numbers, counting numbers, and multiples/factors of a specific number.
- The importance of correctly identifying the cardinality of sets is highlighted throughout the explanation.
Learn about cardinality, which refers to the number of elements in a set. Explore examples of calculating cardinality for sets related to primary colors, school days, prime numbers, even numbers, and more. Understanding cardinality is crucial for counting techniques and accurately determining the elements in a set.
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