A certain school has 300 students, 142 of whom are boys. It has 30 teachers, 12 of whom are men. What percent of the total number of students and teachers in the school is female?

44% of the teachers in a school are males and the number of female teachers is 42. Find the total number of teachers in the school.

45% of the students in a school are boys. If the total number of students in the school is 880, find the number of girls in the school.

Rajdhani College has 2400 students, 40% of whom are girls. How many boys are there in the college?

The table above gives the number of male and female students at Washington High School who are taking Advanced Placement (AP) classes and those who are not. What is the proportions of the total number of students at the school who are both male and NOT taking AP classes?

The ratio of girls to boys at a certain school is 4:3. Which of the following could not be the number of students at the school ?

In a class, three are 30 boys and 25 girls. Find the ratio of the number of girls to that of total number of students.

Total number of students of a school in different years is shown in the following table

In a class, three are 30 boys and 25 girls. Find the ratio of the number of boys to that of total numbers of students.

In Class XI of a certain school, there are 30 students in a Mathematics class and 20 students in Biolog class. Find the number of students which are in Mathematics class or in Biology class in the following cases: (i) Two classes are conducted at the same time. (ii) Two classes are condcuted at different time and 5 students study both the subject