1. How many pieces of eggs are there in 5 dozens? 2. The ratio of boys to girls in a class is 8: 7. If the class has 60 students, how many are girls? 3. Three workers can finish seven chairs in a week. How many chairs can be done by 12 workers in a week? 4. A basket of food is sufficient to feed 10 persons for 3 days. How many days would it last for 5 persons? 5. A basketball team won 3 out of 5 games. At this rate, how many times can the team win in 20 games?