5,385 Answered Questions for the topic probability

Probability Statistics

06/24/21

How do I calculate this problem and is there a way to do it on a TI-84plus?
if there is a 35% chance of rain every day for the next four days, what is the probability that it will rain every day for the four days?
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Probability

06/24/21

i need help on expected values...
Each question on a multiple-choice exam has five choices. One of the choices is the correct answer, worth 4 points, another choice is wrong but still carries partial credit of 1 point, and the... more
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Probability

06/23/21

can someone please help me
A company produces products at a cost of $38 each. Defective products cost an additional $15 each to repair. The probability of no defective products is 80%. The probability of 5% defective... more
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Probability

06/23/21

Permutation and combination
Five persons are chosen at random from a group of ten persons consisting of four men and six women. Calculate the probabilities that the four persons chosen will:1. Consist of five women.2. Consist... more
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06/22/21

What is the mathematical expectation for this game?
Suppose you toss a coin and will win $5 if it comes up heads. If it comes up tails, you toss again. This time you will receive $10 if it comes up heads. If it comes up tails, toss again. This time... more
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06/22/21

What is the expected height (in inches)?
Heights (in inches) obtained by a group of people in a random survey are reported in the following... more
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Probability Statistics

06/21/21

Find the critical values.
An MP claims that the average number of acres in his province’s State Parks is less than 2000 acres.A random sample of five parks is selected and the number of acres is shown below:959, 1187, 493,... more
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Probability Statistics

06/21/21

Find the probability.
It is reported that children between 2 and 6 years old watch an average of 20 hours of TV per week. Assume the variable is normally distributed and the standard deviation is 3 hours. If 20 children... more
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Probability Statistics

06/21/21

What percentage?
The lengths of 5-inch nails manufactured on a machine are normally distributed with a mean of 5.0 inches and a standard deviation of 0.009 inch. The nails that are either shorter than 4.98 inches... more
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Probability Statistics

06/21/21

Find the probability.
Two balls are drawn in succession without replacement from an urn containing 4 red balls and 3 black balls. Find the probability distribution of the number of black balls.
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Probability Statistics

06/21/21

How many committees?
A group of 9 people is going to be formed into committees of 4, 3, and 2 people. How many can be formed if no person can serve on more than one committee?
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Probability Statistics

06/21/21

Find the probability.
In a university, the probability that a student takes calculus or is on scholarship is 0.85. The probability that a student is on scholarship is 0.61 and the probability that a student is taking... more
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Probability Statistics

06/21/21

Find the sample space and probability
A couple has three children.i) Find the sample space for this experiment.ii) Find the probability of getting at least one child of each gender.
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Probability

06/19/21

Probability of 2 different people choosing some of the same marbles from a jar
There are 20,412 unique marbles in a jar. One person picks 11 marbles, and puts them back and the jar is thoroughly mixed. Another person then picks 5 marbles. What is the chance that 2 of the 5... more
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Probability

06/18/21

Probability_Math
​58% of U.S. adults have very little confidence in newspapers. You randomly select 10 U.S. adults. Find the probability that the number of U.S. adults who have very little confidence in newspapers... more
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Probability

06/17/21

need help with this Math question!

In the 2016 referendum on the independence of wales from the UK, approx.44% of welsh population was pro-independence. Suppose we now interview arandom sample of 100 people. What is the probability... more
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Probability

06/16/21

Green, Red and Blue Ball (Probability)
In a bag there are green, blue and red balls. Take one ball off the bag. The probability of taking a green ball is 1/3, and the probability of taking off a blue ball is 1/2. There are 6 red balls.... more
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Probability Math Statistics Act Math

06/15/21

Find the probability that
From a box there are 6 white balls and 4 red balls, then 4 balls are selected, without replacement, at random and transferred to a second box, which is empty.balls are selected at random and... more
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Probability Statistics Act Math

06/15/21

Determine the probability that this student is a) very well prepared, b) poorly prepared.
In a group of 10 students taking the exam, there are 3 who have prepared very well, 4 well, 2 moderately well and one poorly.well, 4 well, 2 moderately and 1 poorly prepared. There are a total of... more
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Probability

06/15/21

Box containing 2 white ball and 3 red ball A={ chosen a ball is red} i) write down elements of A and sample space ii) are the outcomes in A are equally likely? explain and find P(A)
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Probability Math Statistics

06/14/21

Using the set of data, which set has larger variance? Justify the answer without computing the variance of each set of data.
Consider the following data:Data 1 Data 21 142 144 156 152 163 135 121 133 ... more
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Probability Statistics

06/12/21

Finding probability using population mean and sample standard deviation
Greenleaf Lawn Care finds that the population mean cost of leasing homes in the area is $1250. If 20 homes are randomly selected, the standard deviation in the sample is s = $963. What is the... more
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06/12/21

what percent of these differ from the population mean(nomal distribution)
if a set of observations is normally distributed, what percent of these differ from the population mean by more than 0.96σ, where σ is the population standard deviation.
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Probability

06/11/21

Statistics probability

Use a normal approximation to find the probability of the indicated number of voters. In this​ case, assume that 144 eligible voters aged​ 18-24 are randomly selected. Suppose a previous study... more
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Probability

06/11/21

Mathematics Probability
An average of 5 customers come to the shop every half hour. Find the probability that exactly two customers will come to the shop during a given hour2. The life span of an automatic washer is... more
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