Worksheet 9 7 math 7 independent and dependent events answers

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Grade 7 McGraw Hill Glencoe - Answer Keys

Chapter 9: Probability; Lesson 7: Independent and Dependent Events

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Independent Practice

A number cube is rolled and a marble is selected at random from the bag below. Find each probability. Show your work.

  • Question 1
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    P(1 and red)

  • Question 2
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    P(3 and purple)

  • Question 3
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    P(even and yellow)

  • Question 4
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    P(odd and not green)

  • Question 5
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    A carnival game wheel has 12 equal sections. One of the sections contains a star. To win a prize, players must land on the section with the star on two consecutive spins. What is the probability of a player winning?

  • Question 6
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    A standard set of dominoes contains 28 tiles, with each tile having two sides of dots from 0 to 6. Of these tiles, 7 have the same number of dots on each side. If four  players each randomly choose a tile, without replacement, what is the probability that each chooses a tile with the same number of dots on each side?

Mrs. Ameldo’s class has 5 students with blue eyes, 7 with brown eyes, 4 with hazel eyes, and 4 with green eyes. Two students are selected at random. Find each  probability.

  • Question 7
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    P(green then brown)

  • Question 8
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    P(two blue)

  • Question 9
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    P(hazel then blue)

  • Question 10
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    P(brown then blue)

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Description of independent and dependent events

NAME DATE PERIOD Homework Practice Independent and Dependent Events The two spinners at the right are spun. Find each probability. 1 48 1 16 1. P×4 and C× 2. P×1 and A× 8 1 B 7 1 12 6 1 4 3. P×even

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What is dependent events in probability?

Dependent events are those which depend upon what happened before. These events are affected by the outcomes that had already occurred previously. i.e. Two or more events that depend on one another are known as dependent events. If one event is by chance changed, then another is likely to differ.

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