A class consist of 10 boys and 8 girls. Three students are selected at random. What is the probability that the selected group has 1 boy and 2 girls?
Three groups of children contain 3 girls and one boy, 2 girls and 2 boys, one girl and 3 boys. One child is selected at random form each group. What is the chance that the three selected consist of 1 girl and 2 boys?