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? Find mean, variance and standard deviation of X.

Answer

`(##NCERT_KAN_MAT_XII_P2_C13_E04_014_A01##)`
Mean =17.53, Var(X)=4.78 and S.D(X)=2.19