5,341 Answered Questions for the topic probability

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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04/12/22

Choose the procedure for estimating the mean difference.
Suppose that a scientist seeks to compare the ability of a new hand sanitizer to eliminate Pseudomonas aeruginosa bacteria against the hand sanitizer currently in use. Assume that the mean number... more
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Probability Mathematics

04/10/22

LOTR Probability Question
In an adventure, Thranduil has five ruby swords, three diamond swords, and two elven swords. From his travel an orc suddenly appeared, he pulls out two swords at random. Find the probability that... more
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Probability Math Sat Math Act Math

04/10/22

Probability question: hitting the target
The probability of an archer to hit the target is 0.85. The archer keeps shooting until he hits the target, but not more than 5 times. What is the probability that he shot not less than 3 times?
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Probability Math Algebra 1 Algebra 2

04/10/22

Two dice are rolled. Determine the probability of the following. Rolling an even number or a number greater than 10.
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Probability Math

04/09/22

Mathematics Probability
Tony had 5 red socks, 3 blue socks, and 2 white socks in a drawer. He pulled out 2 socks at random from the drawer. What is the probability that one sock is blue, and the other is red?
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04/09/22

From a standard deck of cards, what is the probability of choosing .....
a red and then a club with replacement? a diamond, then a heart, then a black without replacement?
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Probability

04/09/22

Pax turn up only 95% of the time. Airline can fit 40 pax but sells 42 tickets. What is the probability that 42 show up?
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Probability Statistics

04/08/22

I need help with probability statistics!!
The lengths of births in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 15 days.In what range would you expect to find the middle 98% of most... more
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Probability Math Act Math Maths

04/07/22

Probability Math- Seven horses are entered into a race.

Seven horses are entered into a race. If three horses are tied for first place, and there are no ties among the other four horses, in how many ways can the seven horses cross the finish line?I... more
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Probability

04/07/22

A card is drawn from an ordinary deck. Find these probabilities. 1 Of getting a jack 2 Of getting the 6 of clubs (i.e., a 6 and a club) 3 Of getting a 3 or a diamond 4 Of getting a 3 or a 6
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Probability

04/07/22

A card is drawn from an ordinary deck. Find these probabilities. 1 Of getting a jack 2 Of getting the 6 of clubs (i.e., a 6 and a club) 3 Of getting a 3 or a diamond 4 Of getting a 3 or a 6
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Probability

04/07/22

A card is drawn from an ordinary deck. Find these probabilities. 1 Of getting a jack 2 Of getting the 6 of clubs (i.e., a 6 and a club) 3 Of getting a 3 or a diamond 4 Of getting a 3 or a 6
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Probability

04/07/22

A card is drawn from an ordinary deck. Find these probabilities. 1 Of getting a jack 2 Of getting the 6 of clubs (i.e., a 6 and a club) 3 Of getting a 3 or a diamond 4 Of getting a 3 or a 6
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