Question
A math class has
7
girls and
5
boys in the seventh grade and
4
girls and
4
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.
7
girls and
5
boys in the seventh grade and
4
girls and
4
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.
Answers
Reiny
grade7: 7girls, 5 boys
grade8: 4 girls, 4boys
prob(boy from gr7 and boy from gr8)
= (5/12)(4/8) = 5/24
grade8: 4 girls, 4boys
prob(boy from gr7 and boy from gr8)
= (5/12)(4/8) = 5/24
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