Find the expected value of the discrete random variable X having the probability distribution f(x) = |x

Question:

Find the expected value of the discrete random variable X having the probability = |x – 2| / 7 for x = –1, 0, 1, 3
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...