In a class of 50 students, there are 23 girls. What is the percentage of boys in the class?
In class 10 A , there are 24 boys and 25 girls. In class 10B , there are 20 boys and 20 girls. One student is selected from each class for an activity. What is the probability of both of them being girls ?
In a class of 50 students there are 30 girls. The ratio of boys to the girls is: