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91Ó°ÊÓ

Determine the number of sample points contained in the sample space when you toss the following: a. 1 die b. 2 dice c. 4 dice d. \(n\) dice

Short Answer

Expert verified
a: 6, b: 36, c: 1296, d: \(6^n\)

Step by step solution

01

Understand the Sample Space for One Die

A die is a cube with six faces, each representing a different number from 1 to 6. Hence, when you toss 1 die, there are 6 possible outcomes, each corresponding to one of these faces. Therefore, the number of sample points in the sample space when you toss 1 die is 6.
02

Determine Sample Space for Two Dice

When tossing 2 dice, each die operates independently to produce its own outcome. Since each die has 6 possible outcomes, the total number of sample points for two dice is the product of the number of outcomes for each die. This is calculated as:\[6 \, \text{(outcomes for the first die)} \times 6 \, \text{(outcomes for the second die)} = 36\]Thus, the sample space for 2 dice contains 36 sample points.
03

Calculate Sample Space for Four Dice

Similar to previous calculations, with independent outcomes for each die, we raise the number of outcomes for a single die (6) to the power of the number of dice (4 in this case). This results in:\[6^4 = 1296\]Therefore, when you toss 4 dice, the sample space contains 1296 sample points.
04

Generalize the Formula for n Dice

To determine the sample space for any number \( n \) of dice, consider that each die adds 6 independent outcomes to the sample space. Hence, for \( n \) dice, the number of sample points is:\[6^n\]This formula gives you the number of possible outcomes based on the number of dice tossed.

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Key Concepts

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

Die Toss Outcome
When you toss a die, you're engaging in a simple yet fascinating experiment. A standard die, or cube, is marked with six faces, each face numbered from 1 to 6. Every toss results in exactly one of these faces landing on top, making it the outcome. The possible results from this action wrap into what is called the "sample space." This sample space for one die consists of precisely six distinct outcomes, one for each face of the die.
It is essential to understand that every face, and thus every number from 1 to 6, has an equal probability of appearing. The fairness of the die ensures this. Understanding these outcomes is the first step toward grasping more complex probability concepts.
Independent Events
In probability, we often encounter the term "independent events," particularly when dealing with multiple dice. Independent events are those where the outcome of one event does not affect the outcome of another. With dice, this means that tossing one die has no bearing on the result of another. Each die operates on its own with its own discrete set of outcomes.
When you roll two dice, each die rolls independently. So for each die, the same six possible outcomes exist. These independent actions mean that to find the total number of outcomes, we multiply the number of outcomes for each die together. This concept is vital when calculating probabilities, as it forms the basis for determining the total sample space. Remember: if you roll three dice or more, the principle still holds. Each die roll remains independent of the others.
Probability Calculation
Understanding how to calculate probabilities helps make sense of the odds associated with different events. When considering a dice toss, you want to look at the number of favorable outcomes over the total number of possible outcomes.
For a single die, if you want the probability of rolling a specific number, say a 3, this is straightforward. Since there are 6 possible outcomes and only one favorable outcome (getting a 3), the probability is \[ \frac{1}{6} \]. This can be extended to more complex scenarios, such as calculating the probability of rolling a total of 7 with two dice. Here, you calculate the favorable outcomes (like rolling a 1 and a 6, a 2 and a 5, etc.) over the sample space size of 36.
  • Identify the event of interest, e.g., rolling a 7.
  • Count all the ways the event can occur.
  • Formulate the probability using the total sample space size.
Recognizing patterns and applying multiplication principles assist greatly in these calculations.
Mathematical Formula
The power of mathematical formulas lies in their ability to generalize solutions. For dice, one such formula expresses the sample space for multiple dice tosses.
The formula \( 6^n \) is crucial here. It represents the number of sample points where \( n \) is the number of dice tossed. Each die has 6 possible outcomes, and raising 6 to the power of the number of dice gives you the total outcomes for that scenario.
  • For 1 die: \( 6^1 = 6 \).
  • For 2 dice: \( 6^2 = 36 \).
  • For 4 dice: \( 6^4 = 1296 \).
  • And generally, for \( n \) dice: \( 6^n \).
This formula elegantly captures the essence of exponential growth in the sample space size as more dice are tossed, making complex calculations more tractable.

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Most popular questions from this chapter

Dominant versus recessive traits. An individual's genetic makeup is determined by the genes obtained from each parent. For every genetic trait, each parent possesses a gene pair, and each parent contributes one-half of this gene pair, with equal probability, to his or her offspring, forming a new gene pair. The offspring's traits (eye color, baldness, etc.) come from this new gene pair, each gene of which possesses some characteristic. For the gene pair that determines eye color, each gene trait may be one of two types: dominant brown \((B)\) or recessive blue \((b)\). A person possessing the gene pair \(B B\) or \(B b\) has brown eyes, whereas the gene pair \(b b\) produces blue eyes. a. Suppose both parents of an individual are brown eyed, each with a gene pair of type \(B b\). What is the probability that a randomly selected child of this couple will have blue eyes? b. If one parent has brown eyes, type \(B b\), and the other has blue eyes, what is the probability that a randomly selected child of this couple will have blue eyes? c. Suppose one parent is brown eyed with a gene pair of type \(B B\). What is the probability that a child has blue eyes?

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