5,395 Answered Questions for the topic probability

Probability

02/16/21

Consider two random variable X and Y
Consider two random variable X and Y with following relationY = 2X+3The probability distribution of X is given as follows:X 3 4 6p(X) 0.3 0.4 0.3Find mean and variance of distributions X, Y.
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Probability

02/16/21

Elementary probability
A box contains 3 black balls, 2 white balls... A ball is picked from the bag and then replaced, a second ball is chosen, what is the probability that 1. They are both black. 2. One is black and one... more
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Probability Math Statistics

02/16/21

Card Probability

what is the probability that EXACTLY, not at LEAST, but EXACTLY,1 out of 3 cards is a spade, with the three cards drawn from a 52 card deck?
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Probability

02/14/21

What is the 80th percentile for this exam?

Standard deviation 16Mean Score 100
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Probability

02/14/21

What percentage of the population scored between 80 and 110 points on this exam ?
Mean Score 100Standard Deviation 16
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Probability

02/14/21

What percentage of the population scored over 80 points on this exam

Standard deviation (16)Mean score (100)
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Probability Statistics

02/14/21

If x is normally distributed with mean µ and standard deviation σ, and given that the probability that x is less than 32 is 0.0228, find the value of µ.
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Probability

02/13/21

What is the probability of rolling a sum of 11 on a standard pair of six-sided dice? Express your answer as a fraction or a decimal number rounded to three decimal places, if necessary.
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02/13/21

Slow pitch baseball, mean:28 and standard deviation:2.1. Wooden baseball, mean:33 and standard deviation:3.2. Find probability that a slow pitch softball bat weighs more than a wooden baseball bat?
The distribution of the weights of slow pitch softball bats and wooden baseball bats are each approximately normal.
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Probability Statistics Z Score

02/12/21

Statistics question HELP
Every year "Nathan's hotdog stand of Coney Island NY holds a hot dog eating contest. Assume the that number of hot dogs eaten by contestants last year was normally distributed with a mean of 40 and... more
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Probability

02/12/21

What is the probability you pick a student in the school and they prefer to use Tik-Tok OR they are a Junior? (Write as a percent rounded to the nearest hundredth)
Tik-Tok Snapchat TotalFreshman 345 122 467Sophomore 289 203 492Junior 178 109 287Senior 103 ... more
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Probability

02/12/21

What is the probability you pick a student in the school and they prefer to use Tik-Tok AND they are a Junior? (Write as a percent rounded to the nearest hundredth
tik tok Snapchat TotalFreshman 345 122 467Sophomore 289 203 492Junior 178 109 287Senior ... more
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Probability

02/12/21

A bag contains 7 green marbles, 3 blue marbles, 2 red marbles, 4 purple marbles, and 9 black marble. What is the probability that you will draw a purple OR blue?
(Write as a decimal rounded to the nearest tenth
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Probability

02/12/21

A bag contains 5 green marbles, 3 blue marbles, 7 red marbles, 4 purple marbles, and 11 black marble. What is the probability that you will draw a Green OR Red marble? (Write as a reduced fraction)
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Probability

02/12/21

A bag contains 5 green marbles, 3 blue marbles, 7 red marbles, 4 purple marbles, and 11 black marble. What is the probability that you will draw a Green OR Red marble? (Write as a reduced fraction)
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Probability

02/12/21

Convert the fraction to a percentage and round to the nearest tenth. 4/63
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Probability

02/12/21

2. Convert the fraction to decimal and round to the nearest hundredth. 7/19
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Probability

02/12/21

2. Convert the fraction to decimal and round to the nearest hundredth. 7/19
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Probability

02/12/21

Reduce the following fraction to its simplest form. 12/96
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Probability

02/11/21

what is the probability that the sum is not divisible by five and not divisible by six
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Probability

02/11/21

what is the probability that the sum is not divisible by five and not divisible by six
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Probability

02/11/21

P(Sum of the two dice is not 9 and not 6)
I need help in getting the solution to the statistics question
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Probability

02/11/21

statistics P(Sum of the two dice is 5 or 8) and P(Sum of the two dice is not 9 and not 6)
I need the solution to those two questions.
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Probability

02/11/21

Probability distribution of rolling 6 dice and getting 6, 5, 4, 3, 2 and 1 unique results
I understand that getting all 6 to be unqiue is the formula:1 x 5/6 x 4/6 x 3/6 x 2/6 x 1/6...as the first number does not matter, but as we continue to roll dice numbers will be 'banned' from... more
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Probability Statistics Maths

02/11/21

What is the expected number of games played?
Ramesh plans to play 39 chess games. Suppose that the chance of his winning in each game is 0.65. However, if Ramesh wins the last game, then he will keep on playing until he loses. The expected... more
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