# 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 200563: Image: A spinner cut into 8 pie shapes,there are two 4s,three 2s,two 1s,& one 3. think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(not 2) = _____ Click here to see answer by rfer(12731)

 Question 200559: Image: A spinner cut into 8 pie shapes,there are two 4s,three 2s,two 1s,& one 3. think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(1 or 2) = _____ Click here to see answer by rfer(12731)

 Question 200564: Below is a sample space for a family with 3 children. BGG stands for the oldest child being a boy, the middle child a girl, and the youngest a girl. Use the sample space to answer the question: How many outcomes are in the sample space? _____ Sample Space BBB BBG BGB BGG GBB GBG GGB GGG Click here to see answer by Edwin McCravy(8999)

 Question 200761: kathy has 10 red socks, 12 green socks, and 26 purple socks in her drawer. in the morning she begins taking a sock out of the drawer one at a time. how many socks must she take out of the drawer to ensure that she was matching green socks? Click here to see answer by josmiceli(9819)

 Question 200767: A recent issue of Bride Magazine suggested that couple planning their wedding should expect two-thirds of those who are sent an invitation to respond that they will attend. Rich and Stacey are planning to be married later this year. They plan on sending 197 invitations a) How many guests would you expect to accept the invitation? b) What is the standard deviation? c) What is the probability 140 or more will accept the invitation? d) What is the probability exactly 140 will accept the invitation Click here to see answer by stanbon(57984)

 Question 200774: Annabel wanted to become an instant millionaire that's why she tried her luck with the lottery. She picked 6 numbers out of the possible 42. What is the probability that she'll win the jackpot? Click here to see answer by checkley77(12569)

 Question 200772: Annabel wanted to become an instant millionaire that's why she tried her luck with the lottery. She picked 6 numbers out of the ossible 42. What is the probability that she'll win the jackppot? Click here to see answer by stanbon(57984)

 Question 200765: A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80% of values will occur Click here to see answer by stanbon(57984)

 Question 200788: An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution. a. what is the probability that Linda Lahey, company president, received exactly 1 email between 4pm and 5pm yesterday? b. what is the probability she received 5 or more email during the same period? c. what is the probability she did not receive any email during the period? Click here to see answer by stanbon(57984)

 Question 200773: In the past, schools in Los Angeles County has closed an average of three days each year for weather emergencies. What is the probability that schools in Los Angeles County will close for four-days next year Click here to see answer by stanbon(57984)

 Question 200787: The computer systems department has eight faculties, six of whom are tenured. Dr Vonder, the chairman, wants to establish a committee of three department faculty members to review the curriculum. If she selects the committee at random: a) What is the probability all members of the committe are tenured b) What is the probability that at least one member is not tenured? (Use the compliment rule) Click here to see answer by stanbon(57984)

 Question 200815: The arithmetic mean of 6 numbers is 17. If two numbers are added, the new set of numbers will have an arithmetic mean of 19. What are the two numbers if their difference is 4? additional question: how do you find the extremes anyway? Click here to see answer by ankor@dixie-net.com(15747)

 Question 200928: Four standard decks of 52 cards are combined. what is the probability of drawing a queen from this combined deck of cards in one draw ? Click here to see answer by rfer(12731)

 Question 200902: Two different natural numbers are selected from the set {1,2,3,…,6}. What is the probability that the greatest common factor of these two numbers is one? Express your answer as a common fraction Click here to see answer by stanbon(57984)

 Question 200682: The accountant department at Weston Materials, inc, a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model Assume the assemble times follow the normal distribution. a) Determine the z values for 29 and 34 hours. What percent of the garage takes between 32 and 34 hours to erect? b) What percent of the garage take between 29 hours and 34 hours to erect c) What percent of the garage takes between 28.7 hours or less erect? d) Of the garage, 5 percent take how mant hours or more to erect Click here to see answer by stanbon(57984)

 Question 200994: One card is selected at random from a standard deck of 52 cards. Determine the probability that the card selected is a red card or a picture card Click here to see answer by stanbon(57984)

 Question 201080: Spinner Image:Two 1's,Two 4's,Three 2's,and ,One 3, think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(even) = _____ Click here to see answer by Alan3354(31538)

 Question 201078: Spinner Image:Two 1's,Two 4's,Three 2's,and ,One 3, think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(odd) = _____ Click here to see answer by Alan3354(31538)

 Question 201082: Below is a sample space for a family with 3 children. BGG stands for the oldest child being a boy, the middle child a girl, and the youngest a girl. Use the sample space to answer the question: What is the probability (in simplest form) that the middle child is a a boy? _____ Sample Space BBB BBG BGB BGG GBB GBG GGB GGG Click here to see answer by jim_thompson5910(28717)

 Question 201077: Spinner Image:Two 1's,Two 4's,Three 2's,and ,One 3, think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(not 2) = _____ Click here to see answer by Alan3354(31538)

 Question 201092: 6 cards: One A,Two B's,Three C's / Die:6 Sides think about first picking a card and then rolling the die. Give the probability in simplest form. P(A, 1) = _____ Click here to see answer by stanbon(57984)

 Question 201076: Spinner Image:Two 1's,Two 4's,Three 2's,and ,One 3, Think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(even) = _____ Click here to see answer by rfer(12731)
 Question 201076: Spinner Image:Two 1's,Two 4's,Three 2's,and ,One 3, Think about spinning this spinner, which is divided into 8 equal segments. Give the probability in simplest form. P(even) = _____ Click here to see answer by MathTherapy(1484)

 Question 201221: A normal population has a mean of 80.0 and a standard deviation of 14.0 Question C= compute the probability of a value between 55.0 and 70.0 Click here to see answer by Edwin McCravy(8999)

 Question 201218: a recent issue of bride magazine suggested that couples planning their wedding should expect two-thirds of those who are sent am invitation to respond that they will attend. rich and stacy are planning to be married later this year. They plan to send 197 invitations Question: what is the probability exactly 140 will accept the invitation? Click here to see answer by stanbon(57984)

 Question 201283: Referring to the figure: 6 cards:One A Two B's & Three B's;Then roll the die(1 out of six) think about first picking a card and then rolling the die. Give the probability in simplest form.(A, even number) Click here to see answer by javeria13(7)

 Question 201282: Referring to the figure: 6 cards:One A Two B's & Three B's;Then roll the die(1 out of six) think about first picking a card and then rolling the die. Give the probability in simplest form.P(C, 6) Click here to see answer by javeria13(7)
 Question 201282: Referring to the figure: 6 cards:One A Two B's & Three B's;Then roll the die(1 out of six) think about first picking a card and then rolling the die. Give the probability in simplest form.P(C, 6) Click here to see answer by Alan3354(31538)

 Question 201280: Referring to the figure: 6 cards:One,A Two B's & Three B's;Then roll the die(1 out of six) think about first picking a card and then rolling the die. Give the probability in simplest form. P(A, 1) = _____ Click here to see answer by javeria13(7)

 Question 201354: Solve the following problems using the Russian peasant algorithm 25 X 17 48 X 39 and 120 X 42 Click here to see answer by RAY100(1637)

 Question 201488: Consider a standard deck of playing cards (52 cards, no jokers). If you draw two cards, what is the probability that the cards are: a. two spades? b. two kings? c. two mismatched cards (do not share suit or face value)? d. two queens? e. any pair (same face value)? f. two matching cards (have either same suit or same face value)? Click here to see answer by Edwin McCravy(8999)

 Question 201490: Consider a standard deck of playing cards (52 cards, no jokers). If you draw one card, what is the probability that the card is: a. a spade? b. a seven (7)? c. a seven (7) and a spade? d. a seven (7) or a spade? Click here to see answer by Edwin McCravy(8999)

 Question 201535: A number is chosen at random between 1 and 25, inclusive. Express as a percent, the probability that it is prime. Click here to see answer by solver91311(17077)

 Question 201545: On any given night, Becky has a 60% chance of seeing a shooting star in any given hour. If Becky watches the sky for two hours, find the following probabilities a. What is the probability that Becky sees a shooting star in both hours? b. What is the probability that Becky sees a shooting star in exactly one hour? c. What is the probability that Becky does not see a shooting star at all? d. Given that Becky did not see a shooting star in the first hour, what is the probability that she will see one in the second hour? Click here to see answer by stanbon(57984)

 Question 201543: Card figure: 1 A, 2 B's, 3 C's Referring to the figure in Question #26, think about first picking a card and then rolling the die. Give the probability in simplest form. P(not A,6) Click here to see answer by stanbon(57984)

 Question 201542: Card figure: 1 A, 2 B's, 3 C's Referring to the figure in Question #26, think about first picking a card and then rolling the die. Give the probability in simplest form. P(C,even number) Click here to see answer by stanbon(57984)

 Question 201518: If a tire has a mean mileage of 60,000 miles and a standard deviation of 2,000, and the company doesn't want to have a replacement expense of more than 4%, what is the minimum guaranteed mileage for the tire? Click here to see answer by stanbon(57984)

 Question 201533: A bag of marbles contains 6 red marbles and 4 blue marbles. If two are selected simultaneously, what is the probability that at least 1 blue marble is drawn? Click here to see answer by stanbon(57984)

 Question 201577: Shaver Manufacturing, Inc. offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution, with a mean of \$1,280 and a standard deviation of \$420 per year. a. What fraction of the employees cost more than \$1,500 per year for dental expenses? b. What fraction of the employees cost between \$1,500 and \$2,000 per year? c. Estimate the percent that did not have any dental expense. d. What was the cost for the 10 percent of employees who incurred the highest dental expense? Click here to see answer by Theo(3504)

 Question 201607: Card Figure: 1 A , 2 B's, & 3 C's. Die 1/6 Referring to the figure, think about first picking a card and then rolling the die. Give the probability in simplest form.P(not B,not even) Click here to see answer by stanbon(57984)

 Question 201541: Card figure: 1 A, 2 B's, 3 C's Referring to the figure in Question #26, think about first picking a card and then rolling the die. Give the probability in simplest form. P,(B,odd number) Click here to see answer by rfer(12731)

 Question 201605: Card Figure: 1 A , 2 B's, & 3 C's. Die 1/6 Referring to the figure, think about first picking a card and then rolling the die. Give the probability in simplest form. P(A,not 2)= Click here to see answer by RAY100(1637)

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