Note 1: The probability distribution for a random variable satisfies the rules of probability.

In particular,

• The probability of each outcome should be a number between 0 and 1.
• The sum of all the probabilities should equal 1.

Check: - All probabilities are between 0 and 1.

- Sum: 1/16 + 4/16 + 6/16 + 4/16 + 1/16 = 16/16 = 1.