/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 33 Suppose Dan is going to upload 1... [FREE SOLUTION] | 91Ó°ÊÓ

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Suppose Dan is going to upload 12 songs to his digital music player. In how many ways can the 12 songs be played without repetition?

Short Answer

Expert verified
There are 479,001,600 ways to play the 12 songs without repetition.

Step by step solution

01

- Understand the Problem

We need to find the number of ways to arrange 12 songs so that they are all played once without repetition. This means we are looking for the number of possible permutations of 12 items.
02

- Apply the Permutation Formula

The number of permutations of n distinct items is given by the factorial of n, denoted as n!. Since we have 12 songs, we need to calculate 12!.
03

- Calculate the Factorial

To find 12!, multiply all whole numbers from 12 down to 1: 12! = 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1.
04

- Compute the Result

Perform the multiplication to find the value of 12!: 12! = 479,001,600.

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Key Concepts

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

factorial
Factorials are fundamental in understanding permutations and combinations. A factorial is denoted by an exclamation mark (!) and is the product of all positive integers up to a given number. For example, the factorial of 4 (written as 4!) is calculated by multiplying 4 × 3 × 2 × 1 to get 24.
Factorials grow very quickly, which is why even relatively small numbers can result in very large factorial values. For example, 12! (the factorial of 12) equals 479,001,600.
Factorials are essential in permutations, as they provide the total number of ways to arrange a set of items without repetition.
counting principles
Counting principles are mathematical rules used to count the number of ways an event can occur. There are two main counting principles: the addition principle and the multiplication principle.
  • **Addition Principle**: If one event can occur in 'm' ways and a second event can occur in 'n' ways, and these events cannot happen at the same time, then the number of ways either event can occur is m + n.
  • **Multiplication Principle**: If one event can occur in 'm' ways and a second event can occur in 'n' ways after the first event, then the number of ways both events can occur is m × n.
In our exercise, the multiplication principle is crucial because arranging songs involves choosing one song out of many and repeating this process without repetition until all songs are chosen. Mathematically, it means calculating the factorial of the total number of items to find the permutations.
combinatorics
Combinatorics is the branch of mathematics dealing with combinations and permutations of objects. It focuses on counting, arrangement, and combination of sets of elements.
A **Permutation** is an arrangement of objects in a specific order, and order is important. For instance, arranging 12 different songs in every possible order requires the use of permutations. Calculating permutations often involves using factorials, as seen in the solution of our exercise.
Combinatorics also includes **Combinations**, where the order does not matter. But for the problem at hand, permutations are key since the sequence of songs plays a crucial role.
Understanding combinatorics is vital for solving complex counting problems in various fields such as probability, computer science, and more.

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Most popular questions from this chapter

In the game Text Twist, six letters are given and the player must form words of varying lengths using the letters provided. Suppose that the letters in a particular game are ENHSIC. (a) How many different arrangements are possible using all 6 letters? (b) How many different arrangements are possible using only 4 letters? (c) The solution to this game has three 6 -letter words. To advance to the next round, the player needs at least one of the six-letter words. If the player simply guesses, what is the probability that he or she will get one of the six-letter words on their first guess of six letters?

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My wife has organized a monthly neighborhood party. Five people are involved in the group: Yolanda (my wife), Lorrie, Laura, Kim, and Anne Marie. They decide to randomly select the first and second home that will host the party. What is the probability that my wife hosts the first party and Lorrie hosts the second? Note: Once a home has hosted, it cannot host again until all other homes have hosted.

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