5,395 Answered Questions for the topic probability

Probability

11/27/21

A charity raffle told people that they should expect to win at least $4 for every ticket they purchase.
A charity raffle told people that they should expect to win at least $4 for every ticket they purchase. There were two $50 gift certificates, seven $20 gift certificates, and eleven $15 gift... more
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11/27/21

What is the probability that the amount of cashew nuts, in a randomly selected packet sold by this company, is between 117.5 grams and 120 grams
The amount of cashew nuts per packet (𝑌), sold by a company, can be modelled using a normal random variable with a mean of 115.0 grams and a variance of 4.0 grams.
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Probability Math Statistics

11/27/21

What is the probability that the amount of cashew nuts, in a randomly selected packet sold by this company, is more than 113 grams?
The amount of cashew nuts per packet (𝑌), sold by a company, can be modelled using a normal random variable with a mean of 115.0 grams and a variance of 4.0 grams.
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11/25/21

Find the probability if a couple to have 3 children that will be unaffected by Tay-Sachs disease
what is the probability that if the couple has three children, none of them will be affected by the syndrome. refer to the attached picture and show solution.is it 107/144? can you verify my... more
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Probability

11/20/21

Probability Leo pulled out pencils from his pencil case and then put them back in 30 times.he record the results in this chart: orange:7,purple 15, black 5,green3
If had 10 pencils in his pencil case,how many of each coloured pencil is he likely to have in his pencil case?
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Probability Mathematics

11/19/21

What is the probability that a group of five friends all have different birthdays?
type of problem: (counting methods and probability) (probability of an event not occurring given multiple opportunities.)
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Probability

11/18/21

Please help with this. Thanks.

Addition and subtractionA spinner has the numbers 1 to 4 on it. The area given to each number relates to their chance of occurring. The probability of spinning a number 4 is 0.1 The probability... more
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Probability

11/16/21

Probability Distribution

There is currently a global pandemic and many researchers and scientists are working towards finding a vaccine that is suitable for children. Assume that Advanced Researcher, a company that is... more
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Probability

11/16/21

Auto insurance company classifies it's customer in three
An auto insurance company classifies its customers in three​ categories: poor,​ satisfactory, and preferred. Each​ year, 30​% of those in the poor category are moved to satisfactory and 5​% of... more
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Probability

11/16/21

two balanced dice are rolled, the probability that the sum of the upturned faces equals to 5
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11/15/21

In any normal distribution, the probability of randomly selecting an observation that is less than the population mean is 68%. True or False?

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Probability

11/15/21

binomial probability
Consider a card selected at a random and replaced. If this experiment is repeated 5 times, let us find the probability of selecting exactly 3 hearts. Use the binomial distribution. Also find out... more
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Probability

11/15/21

Need help with a math question
These values have an average of 8. What is the average distance of those values from that average of 8?
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Probability

11/14/21

Probability Distribution
A bag contains 12 green and 8 orange balls that are identical except for their color.A ball is chosen from the bag, its color noted, and then it is replaced. Eight balls are chosen.(a) Find(i)The... more
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Probability

11/14/21

From a standard 52 card deck, you draw two cards without replacement. What is the probability that both cards are red knowing at least 1 is red?
The probability of a second drawn card being red is (26-1)/(52-1) = (25/51) because we already know one of the 26 red cards is drawn and one is removed from the complete deck.Is there anything I am... more
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Probability Math Precalculus Sat Math

11/13/21

To make the game fair, who should gain points if a 1 is rolled, and how many points should they gain?
A single six-sided die is rolled and point values are assigned to each outcome. The dice is rolled once and if the dice shows a 5 or a 6, Joe gains 6 points. If the dice shows a 2,3 or 4, Fred... more
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Probability Math Precalculus Sat Math

11/13/21

Find the probability that Fred will have a sum of 7, find the probability that Joe and Fred will both have the same sum, and find the probability that billy has a higher sum than 9.
Joe rolls two dice and adds the numbers showing. Fred then rolls two dice and adds the numbers showing.
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Probability Math Precalculus

11/13/21

What is the probability that green is rolled exactly 7 times?
On a dice, one side is red, three sides are green and two sides are blue. The dice is also rolled 20 times.
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Probability Math Math Precalculus

11/13/21

Independent events, A and B where P(B) = 0.25 and P(A ∩ B) = 0.15. Find P(B' l A) and P(A' ∩ B')
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Probability Math Math Precalculus

11/13/21

Independent events, A and B where P(B) = 0.25 and P(A ∩ B) = 0.15. Find P(B' l A) and P(A' ∩ B')
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Probability

11/11/21

Probability Distribution
In a exam, the probability of being awarded a grade A is 0.3.For a group of ten participants, calculate(i)the probability of that three achieve grade A(ii)the probability that at least half achieve... more
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Probability

11/11/21

Probability Distribution
A bag contains 12 green and 8 orange balls that are identical except for their color.A ball is chosen from the bag, its color noted, and then it is replaced. Eight balls are chosen.(a) Find(i)The... more
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Probability

11/11/21

Probability Distribution
In a large town one person in five is left-handed.(a) Find the probability that in a group of 30 person. (i) exactly three will be left-handed (ii) one third will be left handed(b) How... more
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Probability

11/10/21

Probability Distributions
In a box of smarties there are eight different colours which normally occur in equal proportions. Rachael is given 24 smarties, and orange ones are her favourite. Assume they come from a very large... more
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Probability Math Sat Math Act Math

11/09/21

Tricky probability problem
Please help me to solve this one.Mark bought 5 yellow, 3 green, 2 blue, and 2 red notebooks. The next day he brought two of his 12 notebooks. IF he takes the third notebook from the remaining ones,... more
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