Probability Review

What does it mean if an event A occurs with the probability P (A) = 0.9?

• It is certain that event A will occur.

• It is likely that event A will occur.

• It is unlikely that event A will occur.

• It is impossible that event A will occur.

According to the weather forecast, there is a 4/5 chance that it will rain this weekend. How likely is it to rain over the weekend?

• Certain

• Likely

• Unlikely

• Impossible

Jenny bought a bag of gumballs. There were 23 blue, 13 pink, and 14 purple gumballs. What best describes the probability of selecting a blue gumball?

• Likely

• Neither Likely or Unlikey

• Likely

• Certain

This table shows outcomes of a spinner with 3 equal sections colored orange, blue, and white.

Based on the outcomes, which number is the best prediction for the number of times the arrow is expected to land on the orange section if it is spun 20 times?

• 3

• 6

• 30

• 60

Kade is gathering box tops for his school. Last year he was able to collect 312 box tops. Out of 312 box tops, 24 were already expired. He collected 441 box tops this year. How many box tops will be expired this year if Kade can estimate the number of box tops that will expire this year using the ratio from last year? Round to the nearest whole number.

• 26 Box Tops

• 31 Box Tops

• 46 Box Tops

• 34 Box Tops

The spinner shown below is being used in a game.

What is the probability of spinning the arrow once with the result being an even number greater than 5?

• 7/9

• 8/9

• 2/9

• 4/9

Margie and Craig are playing a guessing game. One player chooses a whole number from 1 to 10, and the other player tries to guess it. On his turn, Craig guessed 6, which was not the number Margie chose. What is the probability that Margie’s number is GREATER than Craig’s guess?

• 3/5

• 5/9

• 2/5

• 4/9

Kyra bought a “trick” coin that lands on heads with a probability of 0.4. Which frequency table would Kyra most likely generate by flipping the coin many times?

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• 
• 
• 

Martin spun the arrow on a spinner 200 times. His results are shown in the table.

Which spinner did Martin MOST LIKELY use?

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• 
• 
• 

Joy has an evenly divided spinner with one of the letters A through E in each section. She also has a number cube with one of the numbers 1 through 6 on each side.

What is the probability of rolling a 5 and spinning a B

• 11/30

• 1/11

• 5/6

• 1/30