A science class has 3 girls and 3 boys in the seventh grade and 3 girls and 7 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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1 answer

for the 7th grade, the probability is 3 out of a total of 6 students. for 8th grade, there are 7 out of a total of 10 students. 3/6 times 7/10 is 7/20.
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