Probability of Compound Events

Ricardo has the spinner pictured here and a bag of marbles filled with 2 red marbles, 3 green marbles, and 3 blue marbles. What is the probability that Ricardo spins red on the spinner and picks a red marble out of the bag? (a)  

• 1 ⁄ 16
• 1 ⁄ 2
• 1 ⁄ 4
• 1 ⁄ 8

What is the probability of picking a blue marble, putting it back in the bag, then picking a red marble?

Mathematical Equivalence

ON

A coin and a number cube with the numbers 1 through 6 are tossed. What is the probability of the coin showing tails and the number cube showing the number 3?  (a)  

• 1/12
• 1/4
• 1/8
• 1/2

• 1/4
• 1/8
• 1/2
• 1/6

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A number cube is rolled twice. What is the probability of getting a 6 on the first roll, then a number less than 5 on the second roll?  (a)  

• 2/3
• 5/36
• 1/9
• 1/36

Lucy has the spinner pictured and spins it twice in a row. What is the probability that she lands on blue first and then on yellow or green?

• 1 / 16
• 1 ⁄ 6
• 1 ⁄ 8
• 3 ⁄ 4

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A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10
• 3/9
• 1/9
• 1/3

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Bag A contains 9 red marbles and 3 green marbles. Bag B contains 9 black marbles and 6 orange marbles. Find the probability of selecting one green marble from bag A and one black marble from bag B.  P(green, black)

• 3/20
• 1/4
• 3/31
• 2/27

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The spinner is spun two times.  Determine the probability of landing on red the first spin and on green the second spin .

• 1/9
• 1/10
• 0
• 1/12

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What is the probability of rolling a number greater than 4 and spinning blue?

• 1/24

• 1/12

• 1/6

• 1/4

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