Arithmetic › Ratio and proportion › Boys-to-girls ratios
Children with siblings in the class
High school · ●●●○○ 50 pts
In a class, exactly 18 fathers and exactly 24 mothers attended a parent-teacher meeting, and at least one parent of each student attended. Exactly 10 boys and exactly 8 girls had both parents present. For exactly 4 boys and exactly 3 girls only the mother was present, and for exactly 1 boy and exactly 1 girl only the father was present. There are no children in the class with step-parents or step-siblings. Determine the number of children in this class who have siblings in the same class.