# In Q.1, Exercise 14.2, you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB.Blood GroupNumber of studentsO12A9B6AB3

Number of students having blood group AB = 3

Total number of students = 30
Hence, required probability is $$P = \frac{3}{30} = \frac{1}{10}$$.

Therefore, the probability that a student of this class, selected at random, has blood group AB is $$\frac{1}{10}$$.