W x y z v 32 j q k l m n p 33 multiple choice a

Info icon This preview shows pages 30–33. Sign up to view the full content.

W X Y Z V 32. J Q K L M N P 33. MULTIPLE CHOICE A drawing has a scale of 1 cm : 1 m. What is the scale factor of the drawing? (Section 7.5) A 1 : 1 B 1 : 100 C 10 : 1 D 100 : 1 26. PASSWORD You forget the last two digits of your password for a website. a. What is the probability that you randomly choose the correct digits? b. Suppose you remember that both digits are even. How does this change the probability that your choices are correct? 27. COMBINATION LOCK The combination lock has 3 wheels, each numbered from 0 to 9. a. What is the probability that someone randomly guesses the correct combination in one attempt? b. You try to guess the combination by writing five different numbers from 0 to 999 on a piece of paper. Explain how to find the probability that the correct combination is written on the paper. 28. TRAINS Your model train has one engine and eight train cars. Find the total number of ways you can arrange the train. (The engine must be first.) 29. REPEATED REASONING You have been assigned a 9-digit identification number. a. Why should you use the Fundamental Counting Principle instead of a tree diagram to find the total number of possible identification numbers? b. How many identification numbers are possible? c. RESEARCH Use the Internet to find out why the possible number of Social Security numbers is not the same as your answer to part (b). 30. Problem Solving From a group of 5 candidates, a committee of 3 people is selected. In how many different ways can the committee be selected?
Image of page 30

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

428 Chapter 10 Probability and Statistics Independent and Dependent Events 10.5 Work with a partner. Using the same marbles from Activity 1, randomly draw two marbles from the bag. a. Complete the tree diagram. Let G = green and P = purple. Find the probability that both marbles are green. Is this event more likely than the event in Activity 1? Explain. b. Does the probability of getting a green marble on the second draw depend on the color of the first marble? Explain. ACTIVITY: Drawing Marbles from a Bag (Without Replacement) 2 What is the difference between dependent and independent events? Work with a partner. You have three marbles in a bag. There are two green marbles and one purple marble. Randomly draw a marble from the bag. Then put the marble back in the bag and draw a second marble. a. Complete the tree diagram. Let G = green and P = purple. Find the probability that both marbles are green. b. Does the probability of getting a green marble on the second draw depend on the color of the first marble? Explain. ACTIVITY: Drawing Marbles from a Bag (With Replacement) 1 First draw: Second draw: GG First draw: Second draw: GP Probability and Statistics In this lesson, you will identify independent and dependent events. use formulas to find probabilities of independent and dependent events.
Image of page 31
Section 10.5 Independent and Dependent Events 429 Work with a partner. Conduct two experiments.
Image of page 32

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 33
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern