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A wireless garage door opener has a code determined by the up or down setting of 12 switches. How many outcomes are in the sample space of possible codes?

Short Answer

Expert verified
The sample space has 4096 possible codes.

Step by step solution

01

Understand the Problem

The problem involves determining the total number of possible settings for 12 switches, each having two possible states: up or down. The task is to calculate the total number of unique combinations that can be formed with these switches.
02

Identify the Setting Options

Each switch can be in one of two states: up or down. This means for each switch, there are 2 possible settings. With 12 switches, we want to consider all possible combinations.
03

Calculate Total Combinations

Since each switch has 2 options (up or down), and there are 12 switches, the total number of possible combinations is determined using the formula for combinations in a binary system, which is calculated as follows: \[ 2^{12} \]
04

Compute the Result

Calculate the value of \(2^{12}\), which gives the total number of combinations. \[ 2^{12} = 4096 \] Thus, there are 4096 possible outcomes in the sample space.

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Key Concepts

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

Sample Space
In the world of combinatorics, sample space is a fundamental concept. It is essentially the set of all possible outcomes that can arise from a particular experiment or activity. For example, when you toss a coin, your sample space consists of two outcomes: heads or tails. It's the complete collection of every result that could potentially occur.

In the context of the garage door opener problem, we are dealing with switches. Each switch can be either up or down, similar to our coin toss. When considering multiple switches, like the 12 in our problem, we determine the sample space by seeing all possible arrangements of these switches. Each arrangement represents a unique code for the opener. Hence, the sample space for this problem contains every possible combination of the up and down switch positions.

To calculate the size of this sample space, we consider each switch having two options (up or down). We then multiply the options for each switch across all switches. This is where our formula, \(2^{12}\), helps us. The exponent represents the number of switches, and 2 is the number of positions each can take. This leads us to understand that there are 4096 possible outcomes!
Binary Combinations
Binary combinations are quite intriguing because they involve choices between two alternatives, which is a common scenario in the real world. These types of combinations are used to solve problems where each event has two possible outcomes. Think of a sequence of choices where each point is either a 0 or a 1, like the binary code used in computing.

In our garage door opener problem, binary combinations shine as we examine each switch which can be either up (1) or down (0). This directly relates to binary combinations where every sequence of binary digits (bits) creates a unique code. For 12 switches, the formula \(2^{12}\) is used to determine the number of these combinations. Here, "2" represents the binary choice, and "12" affects how many times this choice is applied, which is the number of switches.

To better understand binary combinations, consider them as building blocks. Each choice adds another layer, and by the end, we can have a vast array of possible configurations. That leads to 4096 different outcomes, showcasing how simple binary decisions build up to something large and diverse.
Permutations
Permutations are about arrangements. They involve the ways in which we can order a set of items. Unlike combinations, which are about selection, permutations consider both selection and arrangement. Key in understanding permutations is the factor of order which matters here.

For situations where switches can only be in one of two states each, permutations don't directly apply in the way they would for a set of distinct items, such as arranging books on a shelf. However, permutations can add additional layers to our understanding when dealing with multi-stage processes or more complex problems involving arrangement.

Imagine a scenario where we are to arrange different settings in a system, permutations can become vital in ensuring that each sequence is considered unique and ordered correctly. While our problem with the binary combination of switches isn't directly about permutations, understanding both terms helps differentiate between just selecting elements (combinations) and ordering them (permutations), enriching our holistic grasp of combinatorial principles.

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