There are 5 brilliant students in class XI and 8 brilliant students in class XlIl. Each class has 50 students. The odds in favour of choosing the class XI are 2 : 3. One of the classes is chosen randomly and then a student is randomly selected. Find the probability of selecting a brilliant student.

In a class of 50 students, 20 are boys and rest are girls. A student is selected at random. Find the probability of selecting a boy.

In a class of 50 students, 20 are boys and rest are girls. A student is selected at random. Find the probability of selecting a boy.

A class has 20 girls and 16 boys. One student is selected at random. Find the probability that the student is a girl.

In a class of 45 students 3/5 of the total number of students are girls how many students of the class are boys?

The heights (in cm) of 50 students of a class are given below One student is selected at random. Find the probability that the height of the selected student is 157 cm.

Direction: There are 1250 total students in 5 different classes in a school. The number of students in class I is 50 less than the number of students in class II. The number of class IV students is 50 more than the number of students in class II. The average number of students in class III and class V is 250. The number of students in class III is 10% less than the number of students in class I. The total number of students of class IV and the number of students of class II is

Direction: There are 1250 total students in 5 different classes in a school. The number of students in class I is 50 less than the number of students in class II. The number of class IV students is 50 more than the number of students in class II. The average number of students in class III and class V is 250. The number of students in class III is 10% less than the number of students in class I. The ratio of the total number of students of class V to the total number of students of class III is