Let U be the set of integers from 1 to 15. U = {1,2,3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} Set A and set B are subsets of U. Set A contains multiples of 2, such as 2, 4, 6.... Set B contains multiples of 3, such as 3, 6, 9.... Use the Venn diagram to help answer the question. A Multiples of 2 B Multiples of 3 U © 2020 StrongMind. Created using GeoGebra. Which set is AU B? O {1,3, 5, 7,9, 11, 13, 15} O {1,2, 4, 5, 7, 8, 10, 11, 13, 14} O {6, 12} O {2,3, 4, 6, 8, 9, 10, 12, 14, 15}
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
![### Union of Sets: Understanding through Venn Diagrams
#### Example Problem
**Problem Statement:**
Let \( U \) be the set of integers from 1 to 15:
\[ U = \{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15\} \]
Set \( A \) and set \( B \) are subsets of \( U \). Set \( A \) contains multiples of 2, such as 2, 4, 6, ..., while Set \( B \) contains multiples of 3, such as 3, 6, 9, ...
#### Venn Diagram and Union of Sets
Use the Venn diagram below to help answer the question. The diagram illustrates the relationship between sets \( A \) and \( B \) within the universal set \( U \).
**Venn Diagram Explanation:**
- The Venn diagram contains two intersecting circles within a rectangle.
- The rectangle represents the universal set \( U \).
- Circle \( A \) represents multiples of 2.
- Circle \( B \) represents multiples of 3.
- The intersection of circles \( A \) and \( B \) represents the elements that are multiples of both 2 and 3.
<img src="https://i.imgur.com/ZSl0p4i.png" alt="Venn Diagram">
#### Question:
Which set is \( A \cup B \) (the union of sets \( A \) and \( B \))?
- \( \{1, 3, 5, 7, 9, 11, 13, 15\} \)
- \( \{1, 2, 4, 5, 7, 8, 10, 11, 13, 14\} \)
- \( \{6, 12\} \)
- \( \{2, 3, 4, 6, 8, 9, 10, 12, 14, 15\} \)
The correct answer is the option that lists all unique elements that are in either set \( A \), set \( B \), or both.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe9bec767-13de-44c8-8f57-26ed975dc127%2Fe704b955-9f81-432b-bf37-96138c433dbd%2F00n55ls_processed.png&w=3840&q=75)
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