📘 set theory

1. **State the problem:** Given sets A and B with $n(A) = 17$, $n(A \cup B) = 38$, and $n(A \cap B) = 2$, find $n(A - B)$, $n(B)$, and $n(B - A)$. 2. **Recall formulas and rules:**

1. **Problem statement:** Given sets $U = \{x \mid x \in \mathbb{N}, x \leq 10\}$,

1. **Problem Statement:** We are given that 30 students like Maths, 25 like Science, and 10 like both Maths and Science. We need to find how many students like only Maths. 2. **For

1. **Problem statement:** In a class, 65% of students like green (G), 45% like blue (B), and some like both. We need to find the percentage who like both colors. 2. **Formula used:

1. **State the problem:** We have 100 voters choosing among three candidates: Akayuure (A), Manukre (M), and Odonti (O). We want to find the number of voters who preferred all thre

1. **Stating the problem:** We are given sets defined by intervals:

1. **Stating the problem:** We are given sets defined as intervals:

1. **Stating the problem:** We have sets defined as intervals: - $u = \{x : -2 \leq x \leq 5\}$

1. Problem 1: Given the numbers of students in various subject combinations, find the following using a Venn diagram for Nursing (N), Business (B), and Computer (C). 2. i. All thre

1. **Problem Statement:** Prove the set identity $$(A \cup B) \cap (A \cup C) = A \cup (B \cap C)$$ where $A$, $B$, and $C$ are subsets of a universal set $U$. 2. **Recall the dist

1. **Problem Statement:** Prove that $$A \cap (B \cup C) = (A \cap B) \cup (A \cap C)$$. 2. **Formula and Important Rules:**

1. The problem states that $Q \subseteq (\mathbb{R} - \mathbb{Z})$, meaning the set $Q$ is a subset of the real numbers excluding the integers. 2. This implies every element $q \in

1. **Problem Statement:** Prove the set identity $$(A \cup B) \cap (A \cup C) = A \cup (B \cap C)$$ where $A$, $B$, and $C$ are subsets of a universal set $U$. 2. **Formula and Rul

1. **Problem Statement:** Classify the given statements about set $A = \{1, 2, 3\}$ as true or false. 2. **Statements:**

1. **Problem statement:** Given the set $A = \{1, 2, 3\}$, classify each statement as true or false: $2 \in A$, $3 \subset A$, $\emptyset \in A$, $\{0\} \subset A$, $A \cup \{\empt

1. **Problem statement:** Given the set $A = \{1,2,3\}$, classify each statement as true or false: 2 \in A, 3 \subset A, \emptyset \in A, \{\emptyset\} \subset A, A \cup \{\emptyse

1. The problem is to verify the set identity $B - A = A^c - B$ using a membership table. 2. Recall the definitions:

1. **Problem Statement:** We have a universal set represented by a rectangle and a set B inside it. We need to draw sets A and C such that:

1. **Problem Statement:** We are given two sets \(p\) and \(q\) with \(|p| = 10\) and \(|q| = 15\). We need to find the number of elements in the Cartesian products \(p \times q\),

1. The problem is to represent questions in a Venn diagram. 2. A Venn diagram is a visual tool used to show relationships between different sets.

1. The problem is to understand and explain what a Venn diagram is and how it is used in set theory. 2. A Venn diagram is a visual tool used to show the relationships between diffe