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Lesson 3: Understand Experimental Probability — Practice Questions

  1. 1. A baseball player got 21 hits in his last 60 at-bats. Based on this data, how many hits would you predict he will get in his next 200 at-bats? ___

  2. 2. A factory's quality control found 6 defective light bulbs in a sample of 300. Based on this rate, how many defective bulbs should be expected in a shipment of 1,500? ___

  3. 3. A six-sided die was rolled 80 times, and it landed on the number '5' a total of 16 times. Based on this experiment, predict how many times it will land on '5' in 250 rolls. ___

  4. 4. During the last 20 days, it rained on 6 of them. Based on this data, what is the predicted number of rainy days for the next 30 days?

    • A. 6
    • B. 9
    • C. 12
    • D. 18
  5. 5. The experimental probability that a customer will use a coupon is 0.15. If 600 customers visit the store, the predicted number of customers who will use a coupon is ___.

  6. 6. A spinner is divided into 8 equal sections. What is the theoretical probability of landing on any single section? Express your answer as a fraction. ___

  7. 7. A standard six-sided die is rolled 30 times, and the number '4' appears 6 times. Based on this experiment, what is the probability of rolling a '4'? Express as a simplified fraction. ___

  8. 8. A bag contains 5 red and 5 blue marbles. After drawing a marble and replacing it 40 times, you draw a red marble 18 times. How does the experimental probability compare to the theoretical?

    • A. The experimental probability is greater.
    • B. The experimental probability is less.
    • C. The probabilities are equal.
    • D. There is not enough information.
  9. 9. A bag contains 5 green, 3 yellow, and 2 blue marbles. What is the theoretical probability of drawing a yellow marble? Express your answer as a fraction. ___

  10. 10. In a survey of 80 students, 20 chose pizza as their favorite lunch. Based on this data, what is the experimental probability that a student's favorite lunch is pizza? Express as a simplified fraction. ___