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25 October, 08:56

A science class has 9 girls and l boy in the seventh grade and 3 girls and 9 boys in the eighth grade. The teacher randomly selects a seventh grader and an

elghth 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.

m

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Answers (1)
  1. 25 October, 09:52
    0
    boys = 9 (eighth grade) + 1 (seventh grade) = 10 boys

    girls = 3 (eight grade) + 9 (seventh grade) = 12

    probability = 22: 2

    = 1/11
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