/*! 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 15 In a certain board game a player... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

In a certain board game a player's turn begins with three rolls of a pair of dice. If the player rolls doubles all three times there is a penalty. The probability of rolling doubles in a single roll of a pair of fair dice is \(1 / 6\). Find the probability of rolling doubles all three times.

Short Answer

Expert verified
The probability is \( \frac{1}{216} \).

Step by step solution

01

Understand the Problem

We are tasked to find the probability of rolling doubles three times in a row with a pair of fair dice. This means we need to compute the probability of getting a specific outcome (doubles) in three consecutive attempts.
02

Identify Probability for One Roll

The problem states that the probability of rolling doubles in a single roll of a pair of dice is \( \frac{1}{6} \).
03

Calculate Combined Probability

To find the probability of rolling doubles three times consecutively, multiply the probability of rolling doubles in a single roll three times: \( \left( \frac{1}{6} \right)^3 \).
04

Compute Final Result

Calculate \( \left( \frac{1}{6} \right)^3 = \frac{1}{6} \times \frac{1}{6} \times \frac{1}{6} = \frac{1}{216} \). Thus, the probability of rolling doubles three times is \( \frac{1}{216} \).

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.

Rolling Doubles
Rolling doubles in dice games means both dice show the same number. With a pair of fair six-sided dice, there are specific combinations that result in doubles:
  • (1,1)
  • (2,2)
  • (3,3)
  • (4,4)
  • (5,5)
  • (6,6)
In total, there are 6 successful doubles outcomes out of 36 possible outcomes when rolling two dice. This gives us the probability of rolling doubles as \( \frac{6}{36} = \frac{1}{6} \).
To find the probability of rolling doubles, we only need to count how many pairs of numbers are the same out of all possible dice configurations. Each die has 6 sides, which directly aligns with the total outcomes for doubles.
Consecutive Outcomes
Consecutive outcomes occur when the same event happens multiple times in a sequence. In the context of dice, rolling doubles consecutively means getting pairs of identical numbers on several rolls back-to-back.
To understand this concept, consider rolling dice three times in a row. Each roll is independent, meaning the result of one roll does not influence the others.
The challenge with consecutive outcomes like triple doubles lies in compounding probabilities. For example, rolling doubles thrice is not just about achieving doubles once but doing so three separate times in a sequence without interruption.
Probability Calculation
To calculate the probability of an event happening multiple times, like rolling doubles on three consecutive rolls, you must utilize the multiplication rule for independent events.
Given the probability of a single roll resulting in doubles is \( \frac{1}{6} \), the task is to find the probability of this event happening three times in a row.
According to probability rules, you multiply the probabilities of each individual event: \( \left( \frac{1}{6} \right) \times \left( \frac{1}{6} \right) \times \left( \frac{1}{6} \right) \). Thus, the combined probability is \( \frac{1}{216} \).
Breaking it down further:
  • First roll: \( \frac{1}{6} \)
  • Second roll: \( \frac{1}{6} \)
  • Third roll: \( \frac{1}{6} \)
Multiply these probabilities together to get the likelihood of rolling doubles all three times consecutively, which illustrates how probabilities interact in independent scenarios.

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

A professional proofreader has a \(98 \%\) chance of detecting an error in a piece of written work (other than misspellings, double words, and similar errors that are machine detected). A work contains four errors. a. Find the probability that the proofreader will miss at least one of them. b. Show that two such proofreaders working independently have a \(99.96 \%\) chance of detecting an error in a piece of written work. c. Find the probability that two such proofreaders working independently will miss at least one error in a work that contains four errors.

An English-speaking tourist visits a country in which \(30 \%\) of the population speaks English. He needs to ask someone directions. a. Find the probability that the first person he encounters will be able to speak English. b. The tourist sees four local people standing at a bus stop. Find the probability that at least one of them will be able to speak English.

A travelling salesman makes a sale on \(65 \%\) of his calls on regular customers. He makes four sales calls each day. a. Construct the probability distribution of \(X\), the number of sales made each day. b. Find the probability that, on a randomly selected day, the salesman will make a sale. c. Assuming that the salesman makes 20 sales calls per week, find the mean and standard deviation of the number of sales made per week.

Adverse growing conditions have caused \(5 \%\) of grapefruit grown in a certain region to be of inferior quality. Grapefruit are sold by the dozen. a. Find the average number of inferior quality grapefruit per box of a dozen. b. A box that contains two or more grapefruit of inferior quality will cause a strong adverse customer reaction. Find the probability that a box of one dozen grapefruit will contain two or more grapefruit of inferior quality.

Two fair dice are rolled at once. Let \(X\) denote the difference in the number of dots that appear on the top faces of the two dice. Thus for example if a one and a five are rolled, \(x=4,\) and if two sixes are rolled, \(X=0\). a. Construct the probability distribution for \(X\). b. Compute the mean \(\mu\) of \(X\). c. Compute the standard deviation \(\sigma\) of \(X\).

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.