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Questions  >>  CBSE XII  >>  Math  >>  Probability
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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.

Mean=17.53,Variance=4.89,StandardDeviation=2.21Mean=18.53,Variance=4.89,StandardDeviation=2.14Mean=17.53,Variance=5.89,StandardDeviation=2.21Mean=17.53,Variance=5.89,StandardDeviation=2.14

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