POW 25 - Probability

1. 1. A laundry basket has 24 t-shirts in it. Four are navy, 12 are red, and the remaining are white. Find the probability of selecting a red shirt at random. Write your answer as a fraction.

1. 2. A laundry basket has 24 t-shirts in it. Four are navy, 12 are red, and the remaining are white. Find the probability of selecting NOT a white shirt at random. Write your answer as a fraction.

1. 3. A laundry basket has 24 t-shirts in it. Four are navy, 12 are red, and the remaining are white. Find the probability of selecting a green shirt at random.

4. 4. Mrs. Irons places the names of each of her four children in a hat at one time. She randomly draws a name, places it back in the hat and draws again. The results are shown in the table below. What is the theoretical probability of selecting the name Joey? Write your answer as a fraction.

4. 5. Mrs. Irons places the names of each of her four children in a hat at one time. She randomly draws a name, places it back in the hat and draws again. The results are shown in the table below. What is the experimental probability of selecting the name Alex? Write your answer as a fraction.

4. 6. Students standing in line for lunch were surveyed about their favorite meal. Their responses are shown in the table. If one student is picked randomly, then which of the following is true?

• The student's favorite meal is half as likely to be pizza than pasta.

• The student's favorite meal is more likely to be fajitas than pizza.

• The student's favorite meal is twice as likely to be pasta than pizza.

• The student's favorite meal is twice as likely to be fajitas than pasta.

7. 7. At a school assembly, four out of the first 10 students were wearing spirit wear. Based on this information, if 500 students were at the assembly, then how many students could be expected to have on spirit wear?

8. 8. Each spinner shown will be spun one time. Which of the following tree diagrams shows all of the possible outcomes when each spinner is spun once?

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9. 9. Joy can choose to ride the bus, the subway, or take a taxi to travel to work on Monday and Tuesday. Which list shows all the possible outcomes of one day and one travel method?

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10. 10. The airport security randomly selected 24 suitcases from in the security line. Of these bags, they screened 7 suitcases. Based on this information, what is the most reasonable prediction for the number of suitcases they will screen in a group of 144?