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Lesson 10-1: Understand Probability — Practice Questions

  1. 1. Which of the following numbers cannot represent the probability of an event?

    • A. 0
    • B. 1
    • C. $\frac{3}{4}$
    • D. 1.1
  2. 2. A standard six-sided die is rolled. What is the probability of rolling a number greater than 6? The answer is ___.

  3. 3. An event that is certain to happen has a probability of ___.

  4. 4. An event has a probability of $\frac{1}{10}$. How would you describe the likelihood of this event occurring?

    • A. Likely
    • B. Unlikely
    • C. Certain
    • D. Equally likely as not
  5. 5. When rolling a standard die, the probability of rolling a number that is an integer is ___.

  6. 6. A box contains 5 red crayons and 7 blue crayons. The probability of randomly picking a blue crayon is ___. Express your answer as a fraction.

  7. 7. When rolling a standard six-sided die, what is the probability of rolling a number less than 4?

    • A. $\frac{1}{6}$
    • B. $\frac{1}{3}$
    • C. $\frac{1}{2}$
    • D. $\frac{2}{3}$
  8. 8. A spinner has 10 equal sections: 2 green, 3 yellow, and 5 purple. The probability of landing on a green section is ___. Express as a simplified fraction.

  9. 9. A class has 12 boys and 15 girls. If one student is chosen at random, what is the probability the student is a boy?

    • A. $\frac{12}{15}$
    • B. $\frac{4}{9}$
    • C. $\frac{4}{5}$
    • D. $\frac{12}{27}$
  10. 10. The letters of the word 'MATHEMATICS' are on separate cards in a bag. What is the probability of drawing an 'M'? Your answer should be a fraction. ___