5,400 Answered Questions for the topic probability

08/22/21

Student T Distribution question: Explain how P (t2 < ‐2.92) = 0.05 ?
Is it because of P (t2 < -2.92) being the same as 1 - P (t2 > -2.92), or how?(The degrees of freedom is 2)
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Probability Math Statistics Help

08/22/21

Pistol Competition Probability pls help
A, B, C and D are to fight a four-cornered pistol competition. All know that A's chance of hitting his target is 0.3, C's is 0.5, B never misses, and D is 0.7. The order of shooting is... more
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08/22/21

Continuous Probability Distributions (Standard Normal Distribution) question: If the daily consumption of the average person follows a normal distribution that consists of the following..
If the daily consumption of the average person follows a normal distribution that consists of the following: 3.58 (mean), 1.04 litres (standard deviation)How many litres do 67.72 percent of... more
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Probability Math Statistics

08/21/21

probability pls help
A, B, C, D were given pistols for a competition. The participants will try to shoot their competitors. If the person is hit, that person will be out of the competition. The shooting will turn in... more
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Probability Math

08/21/21

Cornered Duel Probability pls help
A, B, C, D were given pistols for a competition. The participants will try to shoot their competitors. If the person is hit, that person will be out of the competition. The shooting will turn in... more
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08/19/21

Expected Value question: If E (Y) = 6, then E (6Y - 4) =
If E (Y) = 8, then E (6Y - 4) =
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08/19/21

Variance question: If V (Y) = 6, then V (2Y- 4) =
If V (Y) = 6, then V (2Y- 4) =
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08/16/21

Law of Variance question: If V (Y) = 12, then V (4Y - 8) :
If V (Y) = 12, then V (4Y - 8) ?
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Probability Chance

08/16/21

Probability question. (must be in decimal form)
Question. The probability that Samantha gets a multiple-choice question correct is 0.6. Sammantha attempts 3 multiple choice questions. The probability that she gets at least one correct is:
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08/16/21

Continuous Probability Distributions, Normal Distribution: If 500 pupils' scores that were gathered are within a normal distribution..
If 500 pupils' scores that were gathered are within a normal distribution, and that the mean is 70, the variance is 16, and the standard deviation is 4:1) At random, a pupil was chosen. What is the... more
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08/15/21

The question is about probability and about actuarial statistics
The question has 3 parts -Question- In a class of 92 students probability of you getting to the top is half of any other student. What is the probability of you getting to the top ?These 92... more
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Probability Math Statistics

08/15/21

Probability Question
Probability Question pls help10 randomly selected children are asked if they eat this kind of fruits: mango, blueberry, strawberry, apple, grapes, avocado, orange, bananaChild 1 - blueberry,... more
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Probability Math Help

08/15/21

Probability Question pls help
10 randomly selected children are asked if they eat this kind of fruits: mango, blueberry, strawberry, apple, grapes, avocado, orange, bananaChild 1 - blueberry, strawberry, banana, mangoChild 2 -... more
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Probability

08/13/21

2 probabilities

The end result should only be 1 of 2 (green or blue).Scenario 1 : A+B has 55% probability of equalling green.Scenario 2 : C+D has 72% probability of equalling green.Question : can the 2 scenarios... more
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Probability

08/12/21

Combine 2 probabilities
There is a pathway with a farm on each side (right and left)A: a chicken walks through the pathway and has 75% probability of turning right going to the right farmB: a duck walks through the... more
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Probability

08/11/21

Probability of having concert seats 109 and 110 for separate concerts
I went to an Alan Parsons Project concert in Feb 2020. I got seats 109 and 110. I flew from my residence in PA to CA to see Alan Parsons at The Sabin Theater in LA. About Feb of 2020 as well I... more
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Probability

08/10/21

Two dice are rolled. Determine the probability of the following. ("Doubles" means both dice show the same number.) rolling a 4 or doubles
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Probability Math

08/10/21

A pair of dice are tossed. What is the probability that doubles are rolled, given that the sum on the two dice is less than 10?
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Probability Mathematics

08/09/21

Help with Permutation and combination question!
You have 10 concert tickets of EDM and 7 concert tickets of classical singer . What is the total number of ways in which tickets can be given to three person if they may receive any number of... more
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08/07/21

probability density function
Let X be the amount of time (years) before a new battery stops working. X has the probability density functionf(t) = { C e^(-0.4t) , t ≥ 00 , otherwise,where C is a constant.Find C (using (Pr(-inf... more
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08/07/21

probability density function, find SD(X), find cumulative distribution function (CDF)
Let X be the amount of time (years) before a new battery stops working. X has the probability density functionf(t) = { C e^(-0.4t) , t ≥ 0 0 , otherwise,where C is a... more
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Probability

08/07/21

probability, Statistics
Consider a scenario that you when to a shop where you are the fourth person in the line to purchase the item (you only want to purchase bottle), shop keeper only has two bottle and one... more
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Probability Math Statistics

08/07/21

A box with 5 white balls, and 4 balls from which four balls were selected. calculate:
the probability of getting two white balls. the probability of getting a white ball at most. the probability of getting at least two blue balls.
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Probability Math Statistics Maths

08/07/21

A die is tossed twice. Given that the sum is greater than 7, what is the chance of getting a pair?
A die is tossed twice. Given that the sum is greater than 7, what is the chance of getting a pair?
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Probability Math Statistics

08/07/21

Probability question: A spaceman's supply of oxygen comes from two independent sources.
A spaceman's supply of oxygen comes from two independent sources. Source A has probability 0.9 of working, and Source B has probability 0.8 of working. What is the probability that at least one of... more
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