3,463 Answered Questions for the topic probability


what is the probablitty the fourth photograph will be of katie?

Robert has an envelope containing 24 photographs. Six of the photographs are of Robert, and the rest are of his friend Katie. He will choose 4 photographs at random. If the first 3 are of... more


what is the probablity the second mouse will be white?

there are 4 white mice and 6 brown mice in a cage. Molly will take out 2 mice at random. If the first mouse she takes out is brown.   a. 2/5 b. 4/9 c.1/2 d.4/5


How do I solve this problem?

A checkerboard measures 12 inches by 12 inches. There are 8 squares to a side and the checker measures 1 inch in diameter. What is the probability that if someone threw a checker onto the board... more



A fair die is rolled 10 times. What is the probability that an even number (2, 4 or 6) will occur more than 6 times?A. 0.8281B. 0.2051C. 0.1719D. 0.1172E.  0.9453


there are 5000 tires made including 200 that are defective if 4 tires are randomly selected, what is the probability that they are good?

Asked to use the method of redundancy but I'm having a hard time understanding how to write the equation and solve the problem.   The Wheeling Tire Company produced a batch of 5000 tires that... more


Probablity question

At a hospital, in a sample group,  there are 40 patients who have lung cancer and 30 patients who are smokers.  Of these, 25 smoke and have lung cancer.  If the hospital currently has 200 patients... more
Probability Math Problem


Math help probability

An auto insurance company classifies its customers in three categories: poor, satisfactory, and preferred. Each year, 20% of those in the poor category are moved to satisfactory and 5% of those in... more


What is the probability that tiles numbered 5 and 6 are the last two drawn in a bag with tiles numbered 1 to 6?

Tiles numbered from 1 to 6 are placed in a bag and are drawn to determine which six tasks will be assigned to six people. What is the probability that the tiles numbered 5 and 6 are the last two... more


probability rule 3

Events                    Relative Frequency Clear and dry          0.2 Cloudy and dry        0.3 Rain                        0.4 Snow                       0.10   Based on these data, what... more
Probability Poker


find odds of drawing a spade out of 50 remaing cards

if i had 2 spades what are the odds of drawing a spade from the remaining 50 cards
Probability Math Mathematics


A long probability question

So, my boyfriend ordered cigarettes from across the border and was told there would be a 6% chance it would be rejected at the border.  Unfortunately for his addiction, it was indeed rejected at... more
Probability Cards


Probability of the sum of three random cards from a standard deck of playing cards

Ok, I was watching TV and saw hold'em poker playing. In that game three cards are flipped over in the center of the table. If one was to give the cards valuations (Ace=1, 2=2,....and so forth Jack,... more


find the comulative distribution function CDF?

 a three digit message is transmitted in communication system over a noisy channal having a probability of error Pe=2/5 per digit,


Probability of a deck of cards.

Three cards are randomly selected from a standard deck of 52 cards. What is the probability that the first card is red, the second card is black, and the third card is a heart. You DO NOT REPLACE... more


Research statistics

A business study conducted by researchers showed a positive correlation between employee engagement and customer satisfaction. This is an example of what type of research?     Choose... more


Probability question. Please help

A thief steals an ATM card and must randomly guess the correct 5 digit pass code from a 6-Key key pad. Repetition Is allowed. What is the probability of a correct guess on the first try?   the... more


Probabilities win a pick 6 game where six numbers are draw from the set 1 through 49 and get 24 heads in a row when you flip a fair coin,

probabilities independent and dependent events


If three cars of the same model are randomly selected, what is the probability that each of the three cars have efficiencies exceeding 32 mpg?

The mean of fuel efficiency is 30, with a standard deviation of 1.2 mpg. 


Word problem

There is a 10% chance that I am too tired to grade your test and decide to give you a 100.  If there are 19 tests, what is the probability that 17% of those tests will be given a 100?


central limit theorem

Let X1, , X2 , X3 , …, X20 , be independent samples of a Poisson RV with mean 1. Use thecentral limit theorem to approximateP(∑_(i=1) to 20?Xi≥15)?


What can be said about P[ 0 < X < 40 ] ?

The response time of a system, X, is a random variable with a mean of 20 seconds and avariance of 20 seconds. What can be said about P[ 0 < X < 40 ] ?


Determine the probability that the demand.

Demands for bluetooth headsets at a wireless phone center occur at an average of 11 perday and a standard deviation of 5. The center has an inventory of 100 and does notexpect replenishment in the... more


The expected number of calls

The expected number of calls in progress in a given cell is 75. Give an upper bound onP[ X > 85]


2(x+1)/3=6/5 what is the answer?

what is the answer ? please slove for x please !!!!!!!!! I hate this problem I can't believe it aaaaahhhhhhhhhhhhhh

Binomial Probability Distribution and Poisson Probability Distribution

1. According to a Pew Research Center poll, 40% of American college graduates have outstanding student loans. Suppose that this is true for the current population of American college... more

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.


Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.