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Probability and Statistics Review | Chapter 4

Brief review covering probability calculations, dice rolling, marbles selection, and more. Test your knowledge with interactive questions and detailed answers.

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Probability and Statistics Review | Chapter 4

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  1. MAT 155 Chapter 4 The following is a brief review of Chapter 4. This does NOT cover all the material in that chapter. Click on Slide Show and View Slide Show. Read and note your answer to the question. Advance the slide to see the answer. Thanks to Ms. Valerie Melvin for her portion of this review. Dr. Claude Moore, Math Instructor, CFCC

  2. A bag contains 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue? • 1/3 • 1/7 • 3/16 • 1/13

  3. Assume that one student in a class of 27 students is randomly selected to win a prize. Would it be ‘unusual’ to win? • Yes • No

  4. A die with 8 sides is rolled. What is the probability of rolling a number less than 7? • 7/8 • 6 • 3/4 • 1/8

  5. If a person is randomly selected, find the probability that his or her birthday is in May. Ignore leap years. • 1/365 • 1/12 • 1/31 • 31/365

  6. A bag contains 8 red marbles, 4 blue marbles, and 1 green marble. Find P(not blue). • 9/13 • 9 • 13/9 • 4/13

  7. Of 45 people who answered “yes” to a question, 13 were male. Of the 83 people that answered “no” to a question, 7 were male. If one person is selected at random from the group, find the probability that the person answered “yes” or was male. • 0.156 • 0.406 • 0.289 • 0.508

  8. How many ways can an IRS auditor select 6 of 11 tax returns for an audit? • 462 • 332,640 • 1,771,561 • 720

  9. There are 8 members on a board of directors. If they must elect a chairperson, a secretary, and a treasurer, how many different slates of candidates are possible? • 56 • 336 • 512 • 40,320

  10. If A and B are dependent events, then P(A and B) is • P(A) x P(B|A) • P(A) x P(B) • P(A) x P(A|B)

  11. One of the 87 flights is randomly selected. Find the probability that the flight selected arrived on time given that it was an Upstate Airlines flight. • 43/87 • 11/76 • 43/48 • None of the above is correct.

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