Probablity

Question

A science 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.

Answer 1

P(boy, gr 7 & boy, gr 8) =(5/12)(4/8) = 5/24