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Slide154.JPG

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Question 1 State which of the following are not the probability distributions of a random variable. Give reasons for your answer. (i) Sum of probabilities = 0.4 + 0.4 + 0.2 = 1 Thus, X is a probability distribution (ii) Probability cannot be negative, Since – 0.1 is negative, X is not a probability distribution (iii) Sum of probabilities = 0.6 + 0.1 + 0.2 = 0.9 ≠ 1 Thus, Y is a not a probability distribution (iv) Sum of probabilities = 0.3 + 0.2 + 0.4 + 0.1 + 0.05 = 1.05 ≠ 1 Thus, Z is a not a probability distribution

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.