A science class has 4 girls and 4 boys in the seventh grade and 3 girls and 7 boys in the eighth grade.

A science class has 4 girls and 4 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? answer as a fraction in simplest form.