Let X be a discrete random variable. The probability distribution of X is given below:
Then E (X) is equal to which of the following?
Answer & explanation
Correct answer: option 4
E(X) = [ (30)(1/5) + (10)(3/10) + (-10)(1/2) ]
= 4
Let X be a discrete random variable. The probability distribution of X is given below:
Then E (X) is equal to which of the following?
Correct answer: option 4
E(X) = [ (30)(1/5) + (10)(3/10) + (-10)(1/2) ]
= 4