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# 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

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 $$\frac{1}{10}$$.