In a medical examination of students of a class, the following blood groups are recoreded.

A student is selected at random from the class. The probability that he/she has blod group B, is

In a medical examination of students of a class, the following blood groups are recorded. A student is selected at random from the class. The probability that he/she has blood group B, is

In a medical examination of students of a class , the following blood groups are recorded : From this class , a student is chosen at random . What is the probability that the chosen student has blood group AB ?

A class has fifteen boys and five girls. Suppose three students are selected at random from the class. The probability that there are two boys and one girl is

A class has 15 boys and 5 girls. Suppose three students are selected at random from the class. Find the probability that they are all boys.

A class has 12 boys and 4 girls. If three students are selected at random from the class, what is the probability that all will be boys?

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

There are 60 boys and 40 girls in a class.A student is selected at random.Find the probability that student is a girl.

A class consists of 10 boys and 8 girls. Three students are selected at random. Find the probability that the selected group has : all girls.

A school has six classes 1, 2, 3, 4, 5 and 6 classes 2, 3, 4, 5 and 6 each have the same number of students, but there are twice this number in class 1. If a student is selected at random from the school, What is the probability that he (she)will be in class 1

A school has six classes 1, 2, 3, 4, 5 and 6 classes 2, 3, 4, 5 and 6 each have the same number of students, but there are twice this number in class 1. If a student is selected at random from the school, What is the probability that he (she)will be in class 2