5,395 Answered Questions for the topic probability

Probability

04/21/22

Normal Curve Applications
The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a mean of 24 minutes and a standard deviation of 7 minutes. Find the probability that a randomly... more
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Probability

04/20/22

Using the Standard Normal Table, determine the following:
a) P(z< -1.24)b)P(z < -3.01)c)P(z ≥ 2.21)d) P( -0.36 ≤ z ≤ 1.11)e) P( -0.75 ≤ z ≤ 0.75)
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Probability Math

04/20/22

Suppose that 52% of all students on campus wear glasses. If two students are chosen at random, what is the probability that both of them wear glasses?
Suppose that 52% of all students on campus wear glasses. If two students are chosen at random, what is the probability that both of them wear glasses?Give the answer as a decimal proportion, with 3... more
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Probability Math

04/20/22

Suppose you roll 2 dice. What is the pobability that the sum of the 2 dice is ≤ 4, given that the 1st dice is a 3?
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Probability Math Prealgebra

04/20/22

MATH PROBABILITY I need help pls
You roll a number cube twice. What is the probability of rolling two numbers whose sum is 2?Your answer has to be a fraction!
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Probability

04/19/22

For a random person from the population, what is the probability of being infected given that test result is negative?
In a certain pandemic, 80% of the people are not infected and only 3% of them test positive. 95% of the infected people test positive. For a random person from the population, what is the... more
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Probability

04/19/22

11% of students speak German. 4% of students speak French and German. If astudent is selected at random, what is the probability that the student speaks French given that he/she speaks German?
11% of students speak German. 4% of students speak French and German. If astudent is selected at random, what is the probability that the student speaks French given that he/she speaks German?
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Probability

04/19/22

Probability and Stats

The proportion of voters who prefer Candidate A is p=0.407. An organization conducts a poll of n=5 voters.Let X represent the number of voters polled who prefer Candidate A. Complete the table... more
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Probability Math

04/19/22

card probability?

A new card game consists of 8 red cards, 7 yellow cards, 6 green cards and 5 blue cards. If you have to draw 8 cards, what is the probability that you would:a) draw 2 of each color?b) draw 3 red... more
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Probability

04/18/22

Probability and statistics

A car dealer is going to give away a new car. Each of 460 contestants has been given a key, and only one of those keys will start the car to be given away. The keys are randomly numbered from 1 to... more
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Probability

04/18/22

Probability and Statistics - uniform and binomial distributions

Say 10% of peanut M&Ms are brown, 10% are yellow, 20% are red, 40% are blue, 10% are orange and 10% are green. You grab 10 peanut M&Ms from an extra-large bag of the candies.Round all... more
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Probability

04/18/22

There are 12 blue, 15 green, and 8 red books on a shelf. Two books are selected randomly. What is the probability of choosing two books of different colors
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Probability Statistics

04/18/22

Suppose a jar contains 8 red marbles and 36 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.
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Probability Math Science

04/15/22

Probability Question
Let X be a random variable such that E[X] = 2, E[X^3 ] = 9 and E[(X – 2)^3 ] = 0. What is the Var[X]?
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Probability Math

04/14/22

pizza problems?
In a survey given to 16 students, 7 preferred pepperoni pizza, 5 preferred plain cheese and 4 students didn't have a preference.If three students are selected at random, what is the probability... more
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Probability Math

04/14/22

could you help me with this problem?
You are getting ready to remodel your kitchen and have narrowed down your choices to the following:For the walls, you can choose from teal, tan, blue or navy. For the trim, you can choose white or... more
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Probability

04/14/22

probability of Marble randomly picked
A bag contains three red marbles, two green ones, one pearl blue two yellow and three orange marbles. if you grab at random 5 marbles what is the probability that you have all red ones and the... more
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Probability Statistics

04/14/22

Hypothesis of Interest
Between 2009-2010 all high school classes were taught in person. The mean SAT grades during this period was μ=1100To understand the impact that online classes have on student learning, 16 students... more
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Probability

04/13/22

Quantitative and Reasoning

A fair coin is tossed 5 times. Compute the probability of tossing 5 heads in a row.
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Probability

04/13/22

Interpret Probability
According to a certain airline, flights on a certain route are on time 85% of the time. Suppose 17 flights are randomly selected and the number of on-time flights is recorded. Find and interpret... more
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Probability Math Algebra 2 Algebra

04/12/22

Conditional Probability from a Table
In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probability that a student has a brother given that they have a sister? Has a... more
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Probability Math Algebra 2 Algebra

04/12/22

Conditional Probability from a Table
In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probability that a student has a brother given that they have a sister? Has a... more
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Probability

04/12/22

Probability in Algebra 2 honors
Hannah is playing a virtual reality game in which she must toss a disc to land on the largest triangular section on the board. If the disc is equally likely to land anywhere on the board, what is... more
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Probability

04/12/22

Probability in Algebra 2 honors
Hannah is playing a virtual reality game in which she must toss a disc to land on the largest triangular section on the board. If the disc is equally likely to land anywhere on the board, what is... more
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Probability Math Statistics Maths

04/12/22

Is hypothesis testing an efficient way of solving problems?why? Provide real life experience/example.
Is hypothesis testing an efficient way of solving problems?why?Provide real life experience/example.
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