Question 96
The expected value of x for the probability distribution function of the random variable given below is.
x f(x)
3 0.25
6 0.50
9 0.25
Solution
The expected value of 'x' will be the sum of the products of each possible x multiplied by their respective probability.
=> Expected value of x = 3*0.25 + 6*0.5 + 9*0.25 = 0.75 + 3 + 2.25 = 6
=> Option-C is the correct answer.
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