Give the step-by-step reasoning process and then the final answer. There are 100 students in class and the ratio of boys to girls is 3:2. How many more boys than girls are there?
The class was divided into 3 + 2 = 5 parts. So each part is equal to 100 / 5 = 20 students. Since there are 3 parts for boys, then there are 20 x 3 = 60 boys in class. So there are 100 - 60 = 40 girls in class. Hence, there are 60 - 40 = 20 boys more than girls.
The final answer: 20.