Q. 1 B5.0( 1 Vote )

Which of the following distributions of probabilities of a random variable X are the probability distributions?


Answer :

The key point to solve the problem:


A given distribution of probabilities of a random variable X is said to be probability distribution if the sum of probabilities associated with each random variable is equal to 1


i.e. ∑(pi) = 1


Given distribution is :



Clearly,


Sum of probabilities = P(X = 0) + P(X = 1) + P(X = 2)


= 0.6 + 0.4 + 0.2


= 1.2 ≠ 1


The given distribution is not a probability distribution.


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