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Let \(S=\\{1,2,3,4,5,6\\}, E=\\{2,4,6\\}\) \(\boldsymbol{F}=\\{1,3,5\\}\), and \(\boldsymbol{G}=\\{5,6\\}\). Are the events \(E\) and \(F\) mutually exclusive?

Short Answer

Expert verified
Yes, the events \(E\) and \(F\) are mutually exclusive as their intersection is an empty set: \(E \cap F = \emptyset\).

Step by step solution

01

Verify sets E, F and their elements

Let's confirm the given sets: Set \(S = \{1, 2, 3, 4, 5, 6\}\), event \(E = \{2, 4, 6\}\), event \(F = \{1, 3, 5\}\), and set \(G = \{5, 6\}\). The set E contains even numbers and the set F contains odd numbers.
02

Find the intersection of sets E and F

To determine if events E and F are mutually exclusive, we need to find their intersection, which means we need to find any elements that are common to both E and F. We can do this by comparing each element in E to the elements in F and vice versa.
03

Determine if the intersection is the empty set

After comparing all elements in sets E and F, we notice that there are no common elements between these two sets. Therefore, the intersection of E and F is the empty set, which can be written as \(E \cap F = \emptyset\).
04

Conclude whether events E and F are mutually exclusive

Since the intersection of events E and F is the empty set, we can conclude that events E and F are mutually exclusive, as they can not both occur at the same time.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Set Theory
Set theory is a branch of mathematical logic that studies collections of objects, known as sets. Sets are fundamental objects in mathematics, used to gather and categorize elements. When we look at the fundamentals of set theory, we start with the concept of belonging; any object can be considered an element of a set based on defined criteria.

In our exercise example, we have sets labeled as S, E, F, and G, each comprising various numbers as their elements. For instance, set S is a universal set in this case, containing all possible numbers from 1 to 6. Sets E and F are respectively subsets of S, with E containing the even numbers \(2, 4, 6\) and F containing the odd numbers \(1, 3, 5\).

When we consider two sets within set theory, there are a few fundamental operations we can carry out. One of these operations is the intersection, denoted as \(A \cap B\). The intersection of two sets A and B contains all elements that are both in set A and in set B. If the intersection of two sets is the empty set, we say that there are no common elements and denote it as \(A \cap B = \emptyset\).

In the context of our exercise, we're specifically looking at whether sets E and F have an intersection, which would inform us about the characteristics of these events in terms of their mutual exclusivity.
Finite Mathematics
Finite mathematics is an area of study in applied mathematics dealing with mathematical concepts that involve discrete, as opposed to continuous, elements. It encompasses topics such as sets, counting, probability, statistics, finance, and matrix algebra. These topics are particularly useful in fields like business, computer science, and the social sciences.

In finite mathematics, problems often revolve around finite sets, like the one represented by set S in our exercise, which includes a finite number of elements \(1, 2, 3, 4, 5, 6\). Problems in finite mathematics are typically structured around these finite sets and their possible combinations or arrangements.

Mutually Exclusive Events

An important concept in finite mathematics and probability is that of 'mutually exclusive' events. These are events that cannot occur simultaneously. When applying the principles of set theory to solve problems in finite mathematics, understanding the relationship between sets—such as whether two sets can overlap—is essential. The step-by-step solution of our exercise directly applies the finite mathematics approach to verify the non-overlapping nature of sets E and F, indicating mutually exclusive events.
Probability
Probability is the branch of mathematics concerned with the study of random events and the likelihood of one event occurring over another. The probability of an event is expressed as a number between 0 and 1, where 0 indicates the event will never occur, and 1 indicates that the event will always occur.

When we discuss events in probability, we often describe them as being either 'mutually exclusive' or 'non-mutually exclusive.' Two events are considered mutually exclusive if the occurrence of one event means that the other cannot occur at the same time. This property has a direct link with the concept of set intersection in set theory. If the intersection of two sets (or events) is empty \(A \cap B = \emptyset\), then the events are mutually exclusive, which has a probability of 0 when we talk about them happening simultaneously.

In reference to our exercise, events E and F are sets of outcomes from the roll of a die—and the fact that their intersection is the empty set correlates to a 0% chance that a roll can be even and odd simultaneously. Hence, our exercise demonstrates not only the principles of set theory but also a clear example of how probability is assessed to determine the nature of events.

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Most popular questions from this chapter

Researchers weighed 1976 3-yr-olds from low-income families in 20 U.S. cities. Each child is classified by race (white, black, or Hispanic) and by weight (normal weight, overweight, or obese). The results are tabulated as follows: $$\begin{array}{lcccc} \hline & & {\text { Weight, \% }} & \\ \text { Race } & \text { Children } & \text { Normal Weight } & \text { Overweight } & \text { Obese } \\ \hline \text { White } & 406 & 68 & 18 & 14 \\ \hline \text { Black } & 1081 & 68 & 15 & 17 \\ \hline \text { Hispanic } & 489 & 56 & 20 & 24 \\ \hline \end{array}$$ If a participant in the research is selected at random and is found to be obese, what is the probability that the 3 -yr-old is white? Hispanic?

Two cards are drawn without replacement from a wellshuffled deck of 52 cards. Let \(A\) be the event that the first card drawn is a heart, and let \(B\) be the event that the second card drawn is a red card. Show that the events \(A\) and \(B\) are dependent events.

Propuct Reuasiumr The proprietor of Cunningham's Hardware Store has decided to install floodlights on the premises as a measure against vandalism and theft. If the probability is \(.01\) that a certain brand of floodlight will burn out within a year, find the minimum number of floodlights that must be installed to ensure that the probability that at least one of them will remain functional for the whole year is at least .99999. (Assume that the floodlights operate independently.)

In a survey of 1000 eligible voters selected at random, it was found that 80 had a college degree. Additionally, it was found that \(80 \%\) of those who had a college degree voted in the last presidential election, whereas \(55 \%\) of the people who did not have a college degree voted in the last presidential election. Assuming that the poll is representative of all eligible voters, find the probability that an eligible voter selected at random a. Had a college degree and voted in the last presidential election. b. Did not have a college degree and did not vote in the last presidential election. c. Voted in the last presidential election. d. Did not vote in the last presidential election.

Copykwik has four photocopy machines: \(A, B, C\), and \(D .\) The probability that a given machine will break down on a particular day is \(P(A)=\frac{1}{50} \quad P(B)=\frac{1}{60} \quad P(C)=\frac{1}{75} \quad P(D)=\frac{1}{40}\) Assuming independence, what is the probability on a particular day that a. All four machines will break down? b. None of the machines will break down?

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