5,405 Answered Questions for the topic probability

Probability

05/30/20

Telephone area codes are three-digit numbers of the form XXX.

a) Originally, the first and third digits were neither 0 or 1 and the second digit was always a 0 or 1. How many three-digit numbers of this type are possible?b) Over time, the restrictions listed... more
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Probability

05/28/20

Question on lightbulb probability

Sorry I’m not sure what kind of math this is I’m confused A box contains 9 good light bulbs and 3 defective bulbs. Find the probability that a random sample of 4 bulbs contains exactly 1 defective... more
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Probability

05/28/20

Probability Dice Question
Alice is playing a game in which she will roll 4 6-sided dice at the same time. She gets 5 points for each die that shows an even result. Let x represent the total number of points awarded on any... more
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Probability

05/27/20

math homework for 7th grade
Clinton has two spinners. Spinner A has four congruent sections and Spinner B has three congruent sections as shown. Clinton will spin these two spinners at the same time.                  What is... more
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Probability

05/27/20

Conditional Probability of a Marble Drawing System
Suppose someone has a bag of 5 yellow, 10 red, 15 green, and 20 orange marbles. There are 4 rounds to the drawing, and each round consists of 2 steps. First, a marble is chosen at random from the... more
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05/26/20

27 people attend a conference. door prizes are awarded randomly to 2 people. what is the probability that Adam and Samantha will win the door prizes?
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Probability

05/26/20

Probability question.
When tetanus affects new born infants,it has been observed that only 10% recover in a random sample of 5 new borne affected by tetanus. What is the probability that: 1. Only 2 of them recovers. 2.... more
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Probability

05/25/20

Suppose you are going to draw two cards from a standard deck. What is the probability that the first card is a Jack and the second card is an even card?
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Probability Statistics

05/24/20

How to show that P(B|A')+P(B'|A')=1?
Suppose that A and B are any two events and P(A)>0, show that P(B|A')+P(B'|A')=1?
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Probability

05/23/20

Not sure how to determine PMF
In random access communication protocols a population of users is contending for the use of a common channel to transmit their packets, without the control and supervision of a master station. In... more
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Probability

05/23/20

Need help determining PDF, please.
Given are two random variables X and Y for which the joint probability density function fX,Y (x, y) is given by: fX,Y (x, y) = 0.5xy for 0 ≤ x ≤ y ≤ 2fX,Y (x, y) = 0 otherwise.Let Z = Y − X.... more
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Probability Math Algebra 2

05/22/20

An art gallery has 9 paintings to display along a hallway. How many different ways can they choose and display 6 of the paintings.

A. 4320B. 40320C 60,480D.362,880
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Probability Algebra 2

05/22/20

Introduction to Probability
A teacher selects 3 students from a class of 24 to present their reports. Find the number of orders 3 students can be assigned to present.number of orders=
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Probability Algebra 2

05/22/20

Introduction to Probability
A random sample of 2,500 consumers reports that 61% prefer game A over game B. Which interval best represents the actual percent of people in the population likely to prefer games A over B? Circle... more
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Probability Algebra 2

05/22/20

Introduction to Probability
You are one of six people running for class president. The names of the candidates will be listed in random order on the ballot. Find each probability. Round your answers to the nearest thousandth.... more
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Probability Algebra 2

05/22/20

Introduction to Probability
You shoot an arrow at the target shown, whose diameter is 40 inches. The red bull's-eye is 8 inches in diameter. The rings have equal widths. If the arrow is equally likely to hit anywhere on the... more
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Probability

05/22/20

how many trucks can you make from 4 models, 5 colors and 3 engines
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Probability Algebra

05/22/20

Probability Question
A dart hits the square dartboard shown below at a random point. Find the probability that the dart lands in the shaded circular region. Each side of the dartboard is 13 in, and the radius of the... more
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Probability Algebra

05/22/20

Probability Algebra Questions
A.) Shen has a box of candies and will randomly choose one piece. The odds against choosing a lemon-flavored piece are 9/2. What is the probability of choosing a lemon-flavored piece?B.) Jenny is... more
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Probability Algebra 1

05/21/20

Probability Problem: How many such coupon codes can be generated?

A burger chain wants to send codes for a free small drink to the members of its kids club. The coupon code will have one letter, followed by two digits, followed by two letters. The letters R, S,... more
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Probability Algebra 1 Mathematics

05/21/20

What is the probability that a plain pencil from the first box and a color pencil from the second box are selected?
A box contains 5 plain pencils and 5 pens. A second box contains 7 color pencils and 3 crayons. One item from each box is chosen at random. What is the probability that a plain pencil from the... more
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Probability

05/21/20

Mathematics: Probability Test

A burger chain wants to send codes for a free small drink to the members of its kids club. The coupon code will have one letter, followed by two digits, followed by two letters. The letters R, S,... more
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Probability

05/21/20

Probability help please!
In random access communication protocols a population of users is contending for the use of a common channel to transmit their packets, without the control and supervision of a master station. In... more
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05/21/20

Multiple Choice Probability Math Question
An analyst examining the analytics for her company's web site reports that the probability is 0.07 that a visitor will view the page concerning a newsletter subscription, and 0.04 that a visitor... more
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05/21/20

Multiple Choice Probability Question
From a random sample of 1000 Washington adults, it is discovered that there is a probability of 62% that a person drinks alcohol on a regular basis. The given probability is an example of... more
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