As Steve already did this for you, I don't know why you are repeating it.
... Anyway, prob(of your event)
= (3/10)(5/10)
= 15/100
= 3/20 , which is what Steve had told you.
A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boysin 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 girls?
1 answer