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3.5 Tree and Venn Diagrams

Branching diagrams whose path products give multi-stage probabilities, and overlapping circles that make ORs, ANDs and complements countable at a glance.

Introductory Statistics 2e, 3.5 Tree and Venn Diagrams

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7 exercises

3.5 Exercise 1

There are a total of 11 balls in the urn. Draw two balls, one at a time, with replacement. There are 11(11) = 121 outcomes, the size of the sample space.

a. List the 24 BR outcomes: B1R1, B1R2, B1R3, ...

b. Using the tree diagram, calculate P(RR).

c. Using the tree diagram, calculate P(RB OR BR).

d. Using the tree diagram, calculate P(R on 1st draw AND B on 2nd draw).

e. Using the tree diagram, ca…

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3.5 Exercise 3


Calculate the following probabilities using the tree diagram.

a. P(RR) = ________

b. Fill in the blanks:

P(RB OR BR) = ( 3 11 )( 8 10 ) + (___)(___) =  48 110 \left(\frac{3}{11}\right) \left(\frac{8}{10}\right) \textrm{ } + \textrm{ }(___)(___)\textrm{ } = \textrm{ } \frac{48}{110}

c. P(R on 2nd|B on 1st) =

d. Fill in the blanks.

P(R on 1st AND B on 2nd) = P(RB) = (___)(___) = 24 110 \frac{24}{110}

e. Find P(BB).

f. Find P(B on 2nd|R on 1st).

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3.5 Exercise 14

Find P(Blue bead).

  1. 15 36 \frac{15}{36}
  2. 10 36 \frac{10}{36}
  3. 10 12 \frac{10}{12}
  4. 6 36 \frac{6}{36}
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3.5 Exercise 18

Use the following information to answer the next two exercises. The percent of licensed U.S. drivers (from a recent year) that are women is 48.60. Of the women, 5.03% are age 19 and under; 81.36% are age 20–64; 13.61% are age 65 or over. Of the licensed U.S. men drivers, 5.04% are age 19 and under; 81.43% are age 20–64; 13.53% are age 65 or over.

Complete the following.

  1. Construct a table or a tre…
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3.5 Exercise 20

Use the following information to answer the next two exercises. The percent of licensed U.S. drivers (from a recent year) that are women is 48.60. Of the women, 5.03% are age 19 and under; 81.36% are age 20–64; 13.61% are age 65 or over. Of the licensed U.S. men drivers, 5.04% are age 19 and under; 81.43% are age 20–64; 13.53% are age 65 or over.

Approximately 86.5% of Americans commute to work by…

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3.5 Exercise 22

Use the following information to answer the next two exercises. The percent of licensed U.S. drivers (from a recent year) that are women is 48.60. Of the women, 5.03% are age 19 and under; 81.36% are age 20–64; 13.61% are age 65 or over. Of the licensed U.S. men drivers, 5.04% are age 19 and under; 81.43% are age 20–64; 13.53% are age 65 or over.

Use the following information to answer the next tw…

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3.5 Exercise 23

Use the following information to answer the next two exercises. The percent of licensed U.S. drivers (from a recent year) that are women is 48.60. Of the women, 5.03% are age 19 and under; 81.36% are age 20–64; 13.61% are age 65 or over. Of the licensed U.S. men drivers, 5.04% are age 19 and under; 81.43% are age 20–64; 13.53% are age 65 or over.

Answer these questions using probability rules. Do…

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Adapted from Introductory Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Statistics 2e. Imported at revision 50ec917.