5,366 Answered Questions for the topic probability

Probability Statistics

06/17/20

Three girls and two boys are planning to meet for a party. What is the probability that the first two to arrive are the boys?
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Probability Statistics

06/17/20

In a three-card hand, what is the probability that all three cards are diamonds?
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Probability Statistics

06/17/20

The 10 players on a school basketball team are randomly assigned to 5 double hotel rooms at a tournament. What is the probability that best friends, Carlos and Dewayne, are assigned to the same room?
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Probability Statistics

06/17/20

6 teachers and 10 students wish to join a committee, which will have 8 members. If the members are chosen at random, what is the probability that there are 4 students and 4 teachers on the committee?
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Probability Statistics

06/17/20

A club has 21 members, four of whom are executives. Five members are randomly selected to take part in a survey. What is the probability that four non-executive members are chosen?
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Probability Statistics

06/17/20

About one in every five Canadian residents was born outside of Canada. If 12 Canadian residents are selected at random, what is the probability that 5 of them were born outside Canada?
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Probability Statistics

06/17/20

I need help with a problem from my statistics homework. I don't understand this...
A particular fruit's weights are normally distributed, with a mean of 640 grams and a standard deviation of 26 grams.If you pick one fruit at random, what is the probability that it will weigh... more
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Probability Statistics

06/17/20

I need help with a problem from my statistics homework. I don't understand this...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.1 years, and standard deviation of 0.7 years.If you randomly purchase one item, what is the probability... more
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Probability Math Calculus Statistics

06/17/20

I need help with a problem from my statistics homework. I don't understand this...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.4 years, and standard deviation of 1.7 years.The 3% of items with the shortest lifespan will last less... more
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06/16/20

Statistics Probability Question

A jar of candy contains 45 red jellybeans, 30 green jellybeans, and 60 purple jellybeans. Find the following probabilities. Q: Now suppose 6 jellybeans are selected without replacement instead.... more
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Probability

06/15/20

I want to solve a problem with probability

90% of the children in a developing country have caries, 85% have worms and 70% are undernourished. How high is the percentage of children who have all three ailments?a) At least 70% of the... more
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Probability

06/15/20

What is the expected number of dinner meals eaten at home per week?
A family has the opportunity to eat 7 dinner meals at home per week. The following chart shows the number of dinner meals eaten at home per week, x, and the associated probability P(x) for each... more
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Probability

06/15/20

a) Construct a possibility tree and determine the sample space of this experiment.

According to genetics theory, 37% of all humans have attached earlobes. Experiment: two people are selected at random and it is determined whether or not each has attached earlobes. b) Consider... more
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Probability

06/15/20

What is the probability that the freshman had less than 2 incorrect answers?
The following chart shows the number of questions that incoming freshmen got incorrect on a mathematics placement test along with the associated frequencies: Number wrong Frequency 0 ... more
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Probability

06/15/20

Suppose you play a game in which you roll one die, and the payoff is the number of dots showing. What is the variance of this game?
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Probability

06/15/20

Suppose a survey of 20 students was taken as they walked out of the cafeteria with regards to their age. The results are listed in the table:
Q12. Suppose a survey of 20 students was taken as they walked out of the cafeteria with regards to their age. The results are listed in the table: Older than 30 30 or... more
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Probability Statistics Maths

06/13/20

binomial distribution

A fair 5-sided spinner has sides numbered 1, 2, 3, 4 and 5 The spinner is spun once and the score of the side it lands on is recorded. (a) Write down the name of the distribution that can be used... more
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Probability Math Statistics Decimals

06/12/20

z score in statistics

Find the Z score that most closely corresponds to an area of 0.379 on the left.
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06/12/20

probability in statistics

The number of hours an American adult sleeps each night follows a Normal distribution with an average of 6.9 hours per night with a standard deviation of 0.68 hours. If we randomly select one... more
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06/12/20

Probability in statistics and standard deviation

The number of hours an American adult sleeps each night follows a Normal distribution with an average of 6.9 hours per night with a standard deviation of 0.68 hours. If we take a random sample of... more
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Probability

06/11/20

You roll a 6 sided die what is p(odd) write your answer as a percentage

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Probability

06/10/20

Probability math
a) P(A or B) = p(A) + p(b)P(A) = 0.04P(B) = 0,025P(A or B) = 0,04 + 0,025 = 0,065b) Still don't know the answer to b. I hope some of you could give me the answer. and the way you came to the answer
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Probability

06/10/20

What is the probability
What is the probabilityA copy center has two copyphotos. The likelihood that the machines will require service for a random week is, after long experience, estimated P(A) = 0.040 for one and P(B) =... more
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Probability

06/10/20

What is the probability
A copy center has two copyphotos. The likelihood that the machines will require service for a random week is, after long experience, estimated P(A) = 0.040 for one and P(B) = 0.025 for the other... more
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Probability

06/10/20

this is my question, can someone help me with it .
Q‒2. A box contains 24 transistors, 4 of which are defective. If 4 are sold at random, find the following probabilities. a) Exactly 2 are defectives.b) None is defective.  c) All are defective.d)... more
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