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

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 Algebra: Probability and statistics Solvers Lessons Answers archive Quiz In Depth

 Question 169753: Help please. Two cards are drawn from a standard deck of cards. Find the probability that a king or a red card is drawn. I have to show my work to get credit and don't know how to do this. Thanks Click here to see answer by checkley77(12569)

 Question 169754: Can you please show me how to do these two questions. 1. The time a group of high school students arrive home from school each day was found to be normally distributed. The mean time was 3:15 PM and the times had a standard deviation of 15 minutes. What is the probability that a student chosen at random arrives home from school before 2:30 PM? 2. During a clothing sale, 1/4 of the store merchandise is reduced in price. Find the probability that 3 of 5 randomly-selected shirts have reduced prices. I have to show all my work. Will you please help me. Thank you Click here to see answer by stanbon(57399)

 Question 169751: Will someone please help me. 1. A red die and a blue die are tossed. What is the probability that the red die shows an odd number and the blue die shows a 1 or 2? 2. From a group of 6 men and 4 women, a committee of 3 is to be selected at random. Find P(at least 2 women). I must show all my work and don't know how to do this or where to start. Thank you so much. Click here to see answer by stanbon(57399)

 Question 169479: Let f(n) = the number of zeros at the end of n! when n! is multiplied out. Find: f(12) f(34) Click here to see answer by stanbon(57399)

 Question 169451: Given A = { 2, 4, 8 , 9 }, B = { 5. 8. 9 }, C = { 8, 11, 12, 17 } AND Universal Set U = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17} find a) A U C b) the intersection of A and B c) the complement d) B U A U C Click here to see answer by chiefman(11)

 Question 169882: A box contains 74 brass washer, 86 steel washers and 40 aluminium washers. Three washers are drawn at random from the box without replacement. a) Determine the probability that all three are steel washers. b) Determine the probability that there are no aluminium washers drawn, when three washers are drawn at random from the box without replacement. c) Find the probability that there are two brass washers and either a steel or an aluminium washer when three are drawn at random, without replacement. Click here to see answer by stanbon(57399)
 Question 169882: A box contains 74 brass washer, 86 steel washers and 40 aluminium washers. Three washers are drawn at random from the box without replacement. a) Determine the probability that all three are steel washers. b) Determine the probability that there are no aluminium washers drawn, when three washers are drawn at random from the box without replacement. c) Find the probability that there are two brass washers and either a steel or an aluminium washer when three are drawn at random, without replacement. Click here to see answer by Edwin McCravy(8912)

 Question 169455: a) Find P( 8,5) b) Find C( 8,5) Click here to see answer by Edwin McCravy(8912)

 Question 170057: a baseball player with battling average of .300 comes to bat. what are the odds in favor of the player getting a hit Click here to see answer by checkley77(12569)

 Question 170058: Region 1995 1997 2000 Northe 51.4 51.6 53.6 Midwest 61.8 62.5 64.4 South 91.8 94.2 100.2 West 57.7 59.4 63.2 find probability that a US resident selected random satisfy a.lived in west in 1997 b.lived in midwest in 1995 c.lived in northe or midwest in 1997 d.what are the odds that a randomly selected U.S resident in 2000 was not from the south. Click here to see answer by checkley77(12569)

 Question 170361: I need some assistance with this question, I don't think it the process to answer it as I am making it to be so I could use an answer to compare to. Also, my computer with Excel to use the statistics part of the program is broken so I am doing everything long hand. Thank you for your help. Question: In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehichles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for these three vehicles? Goliath 1600, 760, 880, 1950, 1220 Varmint 1290, 1400, 1390, 1850, 950 Weasel 1090, 2100, 1830, 1250, 1920 I calucated the mean for each car type, each mean is different, but I am not sure if the question is really asking for more than this. For the Goliath I got a mean of 1062, Varmint 1376, Weasel 1638. Thanks for your help. Click here to see answer by Earlsdon(6287)

 Question 170394: This is bothering me, I answered a math problem, This one . Bill has been given a 20 question mulitple choice test. He hasnt attended class recently, and there are 5 answers to each question, but only one is correct...what is the probability that he will answer more than five questions on the test correctly?..explain your answer . I think the answer is , because you multiply the probability of getting one right, and multiply it 6 times, or . Am I right? Click here to see answer by stanbon(57399)

 Question 170425: Solve the problem. Five cards are drawn at random from an ordinary deck of 52 cards. In how many ways is it possible to draw all black cards? a. 32,890 b. 263,120 c. 65,780 d. 131,560 Click here to see answer by jim_thompson5910(28598)

 Question 170523: You randomly select one card from a deck of 52 cards. Find the probabilty of selecting an ace or a 8? Click here to see answer by Mathtut(3670)
 Question 170523: You randomly select one card from a deck of 52 cards. Find the probabilty of selecting an ace or a 8? Click here to see answer by stanbon(57399)

 Question 170522: You randomly select one card from a deck of 52 cards. Find the probabilty of selecting an ace or a 6? Click here to see answer by Mathtut(3670)

 Question 170519: if a single die is rolled find the odds against getting a number less than 4 Click here to see answer by Mathtut(3670)

 Question 170632: Find the dimensions of a rectangle whose perimeter is 46m and whose area is 126m^2. Click here to see answer by checkley77(12569)

 Question 170645: At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml. (a) Which sampling distribution would you use if random samples of 10 bottles are to be weighed? Why? (b) Set up hypotheses and a two-tailed decision rule for the correct mean using the 5 percent level of significance. (c) If a sample of 16 bottles shows a mean fill of 515 ml, does this contradict the hypothesis that the true mean is 520 ml? Click here to see answer by stanbon(57399)

 Question 170658: Ages for the 2005 Boston Red Sox pitchers are shown below. (a) Assuming this is a random sample of major league pitchers, at the 5 percent level of significance does this sample show that the true mean age of all American League pitchers is over 30 years? State your hypotheses and decision rule and show all work. (b) If there is a difference, is it important? (c) Find the p-value and interpret it. Ages of Boston Red Sox Pitchers, October 2005 Arroyo 28 Foulke 33 Mantei 32 Timlin 39 Clement 31 Gonzalez 30 Miller 29 Wakefield 39 Embree 35 Halama 33 Myers 36 Wells 42 Click here to see answer by stanbon(57399)

 Question 170988: According to a National data it was found that 55% of male students live at home. In a random sample of 200 students conducted in a college, what is the probability that the survey will result that at least 130 students are living at home. Click here to see answer by stanbon(57399)

 Question 170989: It is known that 70% of Democrats like music. What is the probability that in a random sample of 50 Democrats, only 30 like music. Click here to see answer by stanbon(57399)

 Question 170987: The following data represents the age (in weeks) at which babies first crawl based on survey of 12 mothers: 52, 30, 44, 35, 26, 47, 37, 56, 39, 26, 39, 28 Assume that the data comes from a normal distribution. Conduct a 95% confidence interval for the mean age at which a baby first crawls. Click here to see answer by stanbon(57399)

 Question 171025: You are asked to make a six-digit password using 0 to 9 without using numbers more than once. how many different combinations can be made. i think its 10x10x10x10x10x10=10,000,000 Click here to see answer by checkley77(12569)

 Question 171130: woul you please show me how to find the probability of randomly choosing a red marble from the given number of red and white marbles? and also how to find the odds. 1.number of red marbles - 16 total number of marbles - 64 Click here to see answer by solver91311(16897)

 Question 171194: How many batting lineups are there for the nine players of a baseball team if the center fielder must bat fourth and the pitcher last? I came up with the answer 7 Am I correct? Click here to see answer by stanbon(57399)

 Question 171205: the speeds in miles per hour of 30 cars were checked by radar, the data is as follows: 62 67 69 72 75 60 58 86 74 68 56 67 82 88 90 54 67 65 64 68 74 65 58 75 67 65 66 64 45 64 Find the upper and lower quartiles? Click here to see answer by Mathtut(3670)

 Question 171181: I'm lost on a portion of this question. Will you please help!! Find the mean, median, mode and standard deviation of the data. Round to the nearest hundreth, if necessary. (The data is as follows: 456 306 160 363 376 935 54 349 I came up with the mean=374.88 I cam up with the mdeian=354.5 The mode I got 0 because no number was repeated Now how do I do the standard deviation? Will please show me the steps to find the standard deviation? Thanks so much Click here to see answer by Mathtut(3670)

 Question 171471: I just want someone to double check my answer. A club consists of 10 members. In how many different ways can a group of 3 people be selected to go on a European trip? I came up with 9 different ways. Is this answer correct? Click here to see answer by Alan3354(30993)

 Question 171494: The numbers 1 to 200 (inclusive) are put into a hat. What is the probability that the first three numbers chosen at random are prime numbers? Round your answer to the nearest ten-thousandths. Click here to see answer by Mathtut(3670)

 Question 171483: The points M, N, O, P, and Q in the following figure represents exits on a highway (the numbers represent miles). An accident occurs at random between points M and Q. What is the probability that it has occurred between N and O? M____5_________N_________8______O_______4_________P_______3________Q Click here to see answer by solver91311(16897)

 Question 171473: I need some help with this problem. Following are the lengths in yards of the nine holes of the University Golf Course. Find each of the following measures with respect to the lengths of the holes: 160 360 330 350 180 460 480 450 380 I have to find the standard deviation? Click here to see answer by Mathtut(3670)

 Question 171510: I need someone to double check my answer. One card is slected at random from a ordinary set of 52 cards. Find the probability of each of the following events: a spade and a 5 are drawn 4 fives = heart, diamond, clover and spade 14 spades - 1(5 of spades) = 13 spades 4/52 = 1/13 13/13 = 1 I came up with answer of 1% Click here to see answer by Mathtut(3670)
 Question 171510: I need someone to double check my answer. One card is slected at random from a ordinary set of 52 cards. Find the probability of each of the following events: a spade and a 5 are drawn 4 fives = heart, diamond, clover and spade 14 spades - 1(5 of spades) = 13 spades 4/52 = 1/13 13/13 = 1 I came up with answer of 1% Click here to see answer by solver91311(16897)

 Question 171554: I need someone to double check my answer please: The heights of 1000 girls at East High School were measured, and the mena was found to be 64 inches., with a standard deviation of 2 inches. If the heights are approximately normally distributed, about how many of the girls are between 60 and 64 inches? I came up with the answer of 0.99997 Click here to see answer by jim_thompson5910(28598)

 Question 171574: I NEED URGENT HELP WITH THESE TWO QUESTIONS. MY STEPS WERE CORRECT BUT CALCULATIONS ARE WRONG. I WANT TO REVIEW FOR MY FINALS. ALL TUTOR YOU ARE WELCOME TO ANSWER. PAID OR NOT. THANKS A BUNCH! I NEED EXPLAINED SOLUTIONS. SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and ﬁnal conclusion that addresses the original claim. 6) The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that ! is known to be 121.2 lb, use a 0.10 signiﬁcance level to test the claim that the population mean of all such employees weights is less than 200 lb. Test the given claim using the traditional method of hypothesis testing. Assume that the sample has been randomly selected from a population with a normal distribution. 7) A large software company gives job applicants a test of programming ability and the mean for that test has been 160 in the past. Twenty-ﬁve job applicants are randomly selected from one large university and they produce a mean score and standard deviation of 183 and 12, respectively. Use a 0.05 level of signiﬁcance to test the claim that this sample comes from a population with a mean score greater than 160. Click here to see answer by stanbon(57399)

 Question 171643: Please double check my work Bill needs an average of 80 on four tests in science to make the honor roll. What is the lowest score he can receive on hte fourth test if his first three scores are 73, 96, and 89? I added 73+96+89 = 258 then I divided 258/3 and came up with the answer of 86 86 is the lowest grade he can make did I do this right? Click here to see answer by nerdybill(6963)
 Question 171643: Please double check my work Bill needs an average of 80 on four tests in science to make the honor roll. What is the lowest score he can receive on hte fourth test if his first three scores are 73, 96, and 89? I added 73+96+89 = 258 then I divided 258/3 and came up with the answer of 86 86 is the lowest grade he can make did I do this right? Click here to see answer by Earlsdon(6287)

 Question 171641: Please double check my work The Ph of a patients blood was measured periodically during one week, and the measured values were 7.37, 7.40, 7.45, 7.45, and 7.44. Find the standard deviation and variance for the data. Round the results to the nearest thousandth. I added 7.37 + 7.40 + 7.45 + 7.45 + 7.44 = 37.11 then I divided 37.11/ 5 and came up with the answer of 7.4222 Did I do this right? Click here to see answer by stanbon(57399)

 Question 171639: Please double check my work Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability. The first marble is white and the second marble is blue. p(white) = 3/8 p(green) = 2/8 = 1/4 p(red) = 2/8 = 1/4 p(blue) = 1/8 I came up with the answer of 6/8. Am I right? Click here to see answer by Earlsdon(6287)

 Question 171735: Can someone please help..... thank you Al and Rudy each roll ordinary dice once. What's the probability that the number of Ruby's roll is greater than the number of Al's roll? Click here to see answer by stanbon(57399)