Questions on Algebra: Probability and statistics answered by real tutors!

Tutors Answer Your Questions about Probability-and-statistics (FREE)

Question 392243: The probability that Barca wins a game with A.C. Milan is 0.2. Suppose they play 7 games. What is the probability that A.C. Milan wins at least four of the games?
Click here to see answer by ewatrrr(10682)

Question 392332: A shipment contains 8 TV's, of which two are defective. A sample of three TV's is selected at random. In how many ways can no defective TV's be chosen?
A firm has 19 senior and 28 junior partners. A committee of three partners is selected at random to represent the firm at a conference. In how many ways can at least one of the junior partners be chosen to be on the committee?
Click here to see answer by sudhanshu_kmr(1152)

Question 392436: Based on your experience thus far in this class, what is the probability that you will receive an "A" grade?
I have no ide where to start. so far there I have no grades to use.
Is this just a example of subjective probability? Is it meant to be a guess?

Click here to see answer by stanbon(57387)

Question 392590: I confuse ,how I know with or 0/w replament home work some time doesn't say,and how I know when add ,when mutipfly , when n/x!(n-x)
Thank
Click here to see answer by haileytucki(390)

Question 392622: Hi! Please! help me with this home work take me forever
A die is rolled 3 time. Find probability
P(three even number)
the answer is 1/8 , I keep try and try I can solve how get 1/8
Thank you very much
Click here to see answer by richard1234(5390)

Question 392762: A researcher predicts that listening to music while solving math problems will
make a particular brain area more active. To test this, a research participant has
her brain scanned while listening to music and solving math problems, and the
brain area of interest has a percentage signal change of 58. From many previous
studies with this same math problems procedure (but not listening to music), it is
known that the signal change in this brain area is normally distributed with a
mean of 35 and a standard deviation of 10. (a) Using the .01 level, what should
the researcher conclude? Solve this problem explicitly using all five steps of hypothesis
testing, and illustrate your answer with a sketch showing the comparison
distribution, the cutoff (or cutoffs), and the score of the sample on this distribution.
(b) Then explain your answer to someone who has never had a course in statistics
(but who is familiar with mean, standard deviation, and Z scores).
Click here to see answer by stanbon(57387)

Question 392806: In a single throw of a die, find the probability of throwing
a) an even number
b) a multiple of 3
c) either an even number or multiple of 3
Click here to see answer by solver91311(16897)

Question 392953: boundries of each value
42.8 miles
1.6 millilliters
5.36 ounces
18tons
93.8 ounces
40 inches
Click here to see answer by robertb(4012)

Question 391769: A short-term insurance company receives 4 claims, on average, per day. What is the probability that over any two day period , at least 2 claims will be received?
Click here to see answer by robertb(4012)

Question 393054: Out of six computer chips, two are defective. If two chips are randomly chosen for testing (without replacement), compute the probability that both of them are defective. List all the outcomes in the sample space.

Click here to see answer by edjones(7569)

Question 392974: cards drawn from standard deck of cards. Find probability.
P(ace or heart)
P(2 or face card)
P(jack or queen)
Click here to see answer by edjones(7569)

Question 393081: There are 4 lgebra books,3 literature books,and 2 biology books on a shelf. If a book is randomtly select,what is the probabilityof selecting a literature book or an algebra books?
Click here to see answer by sudhanshu_kmr(1152)

Question 393079: A die rolled .Find probability
P(even or prime)
P(at least 5)
Click here to see answer by sudhanshu_kmr(1152)

Question 393079: A die rolled .Find probability
P(even or prime)
P(at least 5)
Click here to see answer by Edwin McCravy(8909)

Question 393076: Two dice are rolled. What is the probability that the sum of the dice is bigger than 5 or that at least one of the dice shows an odd number?
Click here to see answer by Edwin McCravy(8909)

Question 393106: there are X girls in a class and 14 fewer boys. Give an algebraic expression for the total number of studentrts in the class
Click here to see answer by checkley79(3050)

Question 393084: Please help me solve this problem.

Find the value of the game (if strictly determined), given the following payout matrix:
|4 -1|
|5 2|

Click here to see answer by ewatrrr(10682)

Question 393144: Suppose the Q-angles (measured standing) for a population of young adult women are normally distributed with a mean of 19° and standard deviation of 8°. Let us call this variable X.Using z score formula z= (X-mean)/s, find out the X-value that represents the 35th percentile of the distribution.

Click here to see answer by ewatrrr(10682)

Question 393099: A random sample of the amount paid (in dollars) for taxi fare from downtown to the airport was obtained: 15,19,17,23,21,17,16,18,12,18,20,22,15,18,20
Us the data to find a point estimate for each of the following parameters.
a. Mean b. Variance c. Standard deviation

Click here to see answer by ewatrrr(10682)

Question 393166: in a shipment of 30 televisions, 4 are defective. if 3 television sets are randomly selected and tested without replacement, what is the probability that the three are defective?
Click here to see answer by ewatrrr(10682)

Question 393165: A poll found that 45% of the workers at the company take the bus instead of the car to work to save money. if 4 workers are selected at random what is the probability that at least 1 worker take the bus instead of the car to work?
Click here to see answer by ewatrrr(10682)

Question 393162: A container has 4 blue marbles, 5 red marbles, and 3 green marbles. if 3 marbles are drawn with replacement, what is the probability that all 3 will be green?
Click here to see answer by ewatrrr(10682)

Question 393159: in a recent poll 70% of the surveyed said that they will not go away on vacation this year. if three people are randomly selected, what is the probability that all 3 will not go away on vacation this year
Click here to see answer by ewatrrr(10682)

Question 393180: A baseball player has a batting average of 0.17. What is the probability that he has exactly 4 hits in his next 7 at bats?
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(1 pt) You flip a fair coin 10 times. What is the probability that it lands on heads exactly 3 times?
The probability of exactly 3 heads is .
What is the probability that it lands on heads at least 3 times?
The probability of at least 3 heads is
Thankyou
Click here to see answer by ewatrrr(10682)

Question 393548: Two dice are rolled. What are the odds against a sum greater than 8?
One of the answers reads like this:
7 : 5
I am not sure what to do. Please help.
Click here to see answer by edjones(7569)

Question 393626: A coin tossed 4 time , How many possible sequenes of heads or tali are possible?
F)4
G)8
H)16
J)32
Click here to see answer by robertb(4012)

Question 393601: determine whether the events are independent or dependent.Then find the probability
A black die and white die are rolled . What is the probability that 3 shows on the black die and a 5 shows on the white die?
Click here to see answer by robertb(4012)

Question 393605: An exponential distribution has a mean of 0.5 .Find probability
x<1
x<2.5
x>3
Click here to see answer by robertb(4012)

Question 393603: What is probability of getting heads each time if a coin is tossed 5 time?
Click here to see answer by robertb(4012)

Question 393664: At a raffle, 100 tickets were sold at $1.00 each for three prizes of $25, $10, and $5. Find the expected value
Click here to see answer by stanbon(57387)

Question 393667: For a fair game what should be the charge to play if there is a .003 probability to win $1,000, .007 probability to win $100, and .99 probability of not winning anything
Click here to see answer by stanbon(57387)

Question 393668: The probability that an employee at the company is over 30 years old is 0.7 if 15 employees are asked their age find the probability that
A) 5 are over 30 years old
B)at least 10 are over 30 years old
C) fewer than 8 are over 30
D)mean
E) variance
F) standard deviation
Click here to see answer by stanbon(57387)

Question 393678: When betting on even in roulette, the winning numbers are even numbers from 2 to 36. There are 38 equally likely events in roulette. What is the probability of winning when betting on even?
Click here to see answer by stanbon(57387)

Question 393697: AT A COLLEGE, 1 OUT OF 4 STUDENTS ARE SOPHOMORES. IF 5 STUDENTS SURVEYED FIND THE
A)MEAN
B) VARIANCE
C)STANDARD DEVIATION
D) PROBABILITY THAT EXACTLY 3 ARE SOPHOMORES
E)PROBABILITY THAT AT MOST 2 OR SOPHOMORES
F) AT LEAST 3 ARE SOPHOMORES
Click here to see answer by ewatrrr(10682)

Question 393749: John and Anita can solve 90% and 70% respectively of statistics problems. If they
try a statistics problem independently, what is the probability that:
(a) both of them solve the problem,
(b) only John solves the problem,
(c) only Anita solves the problem,
(d) neither of them solve the problem,
(e) the problem is solved (or at least one of them solve the problem)
Click here to see answer by stanbon(57387)

Question 393770: Suppose a random sample of 50 values is taken from a normal population with standard deviation 34.7 g. If the sample mean is 167.4 g, construct a 95% confidence interval on the population mean.
Suppose a random sample of 5 values is taken from a normal population with standard deviation 34.7 g. If the sample mean is 167.4 g, construct a 95% confidence interval on the population mean
how and why the confidence intervals in problems 4 and 6 are different
Click here to see answer by ewatrrr(10682)

Question 393782: If the odds in favor of an event A are 2 to 3, what is the probability associated with event A occurring?
Can someone help me setup the formula to solve the problem and I will solve it. I am having a hard coming up with the formula.
Click here to see answer by ewatrrr(10682)

Question 393785: If the odds against an event A are 15 to 1, what is the probability associated with event A occurring
Click here to see answer by ewatrrr(10682)

Question 393792: of 100 coffee shoppers surveyed 22 bought full flavor brand coffee. of the next 300 coffee shoppers, how many will probably buy full flavor brand coffee.

Click here to see answer by ewatrrr(10682)

Question 393795: Can you please answer this question i asked before noone answered i have to hand my homework in by 5 oclock thank you

a school district purchased 5000 computers with a 1 year warranty. 99 computers had to be serviced by the factory in the first year. if a computer is selected at random, what is the probability of picking a computer that needed service under the warranty
Click here to see answer by stanbon(57387)

Question 393769: Calculate the standard error of the mean for a sample of 12 values with mean 67.9, standard deviation 8.3.
Click here to see answer by ewatrrr(10682)

Question 394044: which is bigger 5 over 12 or 19 over 30
Click here to see answer by stanbon(57387)

Question 393801: here is another question i asked before thanks for the all the help
find the
mean
standard deviation
variance
for
x p(x)
0 0.47
1 0.40
2 0.13
Click here to see answer by robertb(4012)

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