14 A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20, 16, 18, 20,
17, 16, 19 and 20 years One student is selected in such a manner that each has
the same chance of being chosen and the age X of the selected student is
recorded What is the probability  distribution of the random variable X