Random variable x has the probability function f(x) = X/6, for x = 1, 2 or 3 The expected value of x is
A) 0.333.
B) 0.500.
C) 2.000.
D) 2.333.

Name: Random variable x has the probability function f(x) = X/6, for x = 1, 2 or 3 The expected value of x is A) 0.333. B) 0.500. C) 2.000. D) 2.333.
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Question

Random variable x has the probability function f(x) = X/6, for x = 1, 2 or 3​ The expected value of x is
A) 0.333.
B) 0.500.
C) 2.000.
D) 2.333.

Quizplus · Accepted Answer

The expected value E(x) is calculated as the sum of each value of x multiplied by its probability, which is E(x) = 1*(1/6) + 2*(2/6) + 3*(3/6) = 1/6 + 4/6 + 9/6 = 14/6 = 2.333.

Random Variable X Has the Probability Function F(x) = X/6