/*! 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 2 The game of roulette involves sp... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

The game of roulette involves spinning a wheel with 38 slots: 18 red, 18 black, and 2 green. A ball is spun onto the wheel and will eventually land in a slot, where each slot has an equal chance of capturing the ball. (a) You watch a roulette wheel spin 3 consecutive times and the ball lands on a red slot each time. What is the probability that the ball will land on a red slot on the next spin? (b) You watch a roulette wheel spin 300 consecutive times and the ball lands on a red slot each time. What is the probability that the ball will land on a red slot on the next spin? (c) Are you equally confident of your answers to parts (a) and (b)? Why or why not?

Short Answer

Expert verified
(a) ≈ 0.474. (b) ≈ 0.474. (c) Equally confident, as spins are independent.

Step by step solution

01

Identify the Number of Slots and Calculate Probability

The roulette wheel has 38 slots in total, comprising 18 red slots. Each slot has an equal probability:The probability of landing on a red slot is the number of red slots divided by the total number of slots.Thus, the probability \( P_{red} = \frac{18}{38} = \frac{9}{19} \approx 0.474 \).
02

Calculate Probability for Part (a)

Notice that each spin is independent of the previous ones. The past outcomes do not affect the probability of the future spin on a fair roulette wheel.Regardless of previous spins, the probability of landing on red for the next spin is:\( P_{red} = \frac{18}{38} = \frac{9}{19} \approx 0.474 \).
03

Calculate Probability for Part (b)

Similarly, the previous 300 outcomes do not influence future outcomes because each spin is independent. Thus, the probability for the next spin landing on a red slot remains:\( P_{red} = \frac{18}{38} = \frac{9}{19} \approx 0.474 \).
04

Analyze Confidence in Your Answers

The probability is calculated based on the independence of each spin; thus, the past spins being consecutive reds do not alter the future probabilities. Therefore, the answer remains the same for both (a) and (b). The confidence should be the same because the probability calculation relies solely on the wheel's makeup and provides no grounds for one scenario to be more confident than the other based solely on independent probability.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

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

Independent Events
In probability theory, an event is considered independent if the outcome of one event does not affect the outcome of another. When dealing with independent events, it's crucial to understand that each event has its own chance of happening, irrespective of past occurrences.

For instance, when a roulette wheel is spun, each spin is independent. What happened in the previous spins does not influence what happens in the next spin. This concept is critical when you calculate probabilities in games of chance.

Let's take a simple everyday example: flipping a coin. If you flip a coin and get heads ten times, the eleventh flip still has a 50/50 chance of being a head.

This notion is foundational to understanding probability and assures that predictions in independent events rely solely on the current scenario, not historical outcomes.
Roulette Wheel
A classic casino game, the roulette wheel is a common example used to explain probability concepts. The wheel typically contains 38 slots: 18 red, 18 black, and 2 green. Each slot represents an equal chance of occurrence, ensuring the randomness of each spin.

On a fair roulette wheel, the ball landing on any given color is random and independent of prior spins. Casinos design roulette wheels so that each slot has an equal opportunity to capture the ball. When you calculate odds or probabilities for each spin, it's critical to remember that the spin is independent, unaffected by previous results.

This characteristic is important for educating students on the randomness and fair chance associated with such games, laying the foundation for understanding complex probability concepts.
Probability Calculation
Probability calculation is a fundamental aspect of learning statistics and is especially applicable in games of chance like roulette. This calculation helps to quantify the likelihood of an event occurring.

For a roulette wheel, the probability of landing on a particular color, say red, is calculated by dividing the number of red slots by the total number of slots:

\[ P(\text{red}) = \frac{18}{38} = \frac{9}{19} \approx 0.474 \]

This means there is approximately a 47.4% chance for the ball to land on a red slot during each spin.

Probability remains a constant resource for assessing chance in scenarios where outcomes are purely random and independent. Mastery of basic probability calculations forms a building block for deeper statistical studies.
Statistics Education
Teaching probability and statistics, especially through real-world examples like the roulette wheel, increases students' understanding and interest. When students see how theoretical concepts apply to real-life situations, they better grasp the importance and applicability of statistics.

Real-world examples such as roulette help illustrate the role of random chance and independent events in everyday scenarios. This can help demystify complex statistical concepts, making them more approachable and engaging.

Educators strive for students to gain confidence in conducting their calculations and develop critical thinking skills regarding probability assessments. This confidence in understanding probability positively influences academic success and decision-making abilities in uncertain situations. Promoting a clear understanding of these principles prepares students for various analytical challenges they may face in life.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Determine if the statements below are true or false, and explain your reasoning. (a) If a fair coin is tossed many times and the last eight tosses are all heads, then the chance that the next toss will be heads is somewhat less than \(50 \%\). (b) Drawing a face card (jack, queen, or king) and drawing a red card from a full deck of playing cards are mutually exclusive events. (c) Drawing a face card and drawing an ace from a full deck of playing cards are mutually exclusive events.

A Pew Research survey asked 2,373 randomly sampled registered voters their political affiliation (Republican, Democrat, or Independent) and whether or not they identify as swing voters. \(35 \%\) of respondents identified as Independent, \(23 \%\) identified as swing voters, and \(11 \%\) identified as both. \(^{21}\) (a) Are being Independent and being a swing voter disjoint, i.e. mutually exclusive? (b) Draw a Venn diagram summarizing the variables and their associated probabilities. (c) What percent of voters are Independent but not swing voters? (d) What percent of voters are Independent or swing voters? (e) What percent of voters are neither Independent nor swing voters? (f) Is the event that someone is a swing voter independent of the event that someone is a political Independent?

The National Vaccine Information Center estimates that \(90 \%\) of Americans have had chickenpox by the time they reach adulthood. \(^{59}\) (a) Suppose we take a random sample of 100 American adults. Is the use of the binomial distribution appropriate for calculating the probability that exactly 97 out of 100 randomly sampled American adults had chickenpox during childhood? Explain. (b) Calculate the probability that exactly 97 out of 100 randomly sampled American adults had chickenpox during childhood. (c) What is the probability that exactly 3 out of a new sample of 100 American adults have not had chickenpox in their childhood? (d) What is the probability that at least 1 out of 10 randomly sampled American adults have had chickenpox? (e) What is the probability that at most 3 out of 10 randomly sampled American adults have not had chickenpox?

Imagine you have a bag containing 5 red, 3 blue, and 2 orange chips. (a) Suppose you draw a chip and it is blue. If drawing without replacement, what is the probability the next is also blue? (b) Suppose you draw a chip and it is orange, and then you draw a second chip without replacement. What is the probability this second chip is blue? (c) If drawing without replacement, what is the probability of drawing two blue chips in a row? (d) When drawing without replacement, are the draws independent? Explain.

Poverty and language. The American Community Survey is an ongoing survey that provides data every year to give communities the current information they need to plan investments and services. The 2010 American Community Survey estimates that \(14.6 \%\) of Americans live below the poverty line, \(20.7 \%\) speak a language other than English (foreign language) at home, and \(4.2 \%\) fall into both categories. \({ }^{22}\) (a) Are living below the poverty line and speaking a foreign language at home disjoint? (b) Draw a Venn diagram summarizing the variables and their associated probabilities. (c) What percent of Americans live below the poverty line and only speak English at home? (d) What percent of Americans live below the poverty line or speak a foreign language at home? (e) What percent of Americans live above the poverty line and only speak English at home? (f) Is the event that someone lives below the poverty line independent of the event that the person speaks a foreign language at home?

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.