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Maths-
General
Easy
Question
A random variable X has the following distribution The value of and P(X<3) are equal to
Hint:
Sum of all probabilities is 1
The correct answer is:
Given : Sum of all probabilities is 1 P(x=1) + P(x = 2) + P(x = 3) + P(x =4) = 1 k + 2k + 3k + 4k = 1 k = Now, P(x < 3) = P(x=1) + P(x =3) P(x < 3) = k + 2k = 3k = Thus, the value of is and P(X<3) is