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A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both boys? Write your answer as a fraction in simplest form.

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  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩

1 answer

  1. 7th grade ... 7/10 boys

    8th grade ... 1/2 boys

    P(two boys selected) = 7/10 * 1/2

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

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