My question

Three tables listed below show random variables and their probabilities. However, only one of these is actually a probability distribution. 3. Which is it? (Click to select) v b. Using the correct probability distribution, find the probability that x is: (Round the final answers to 1 decimal place.) 1. Exactly 20 = 2. No more than 10 = 3. More than 5 = c. Compute the mean, variance, and standard deviation of this distribution. (Round the final answers to 2 decimal places.) 1. Mean ,u 2- Variance 02 3. Standard deviation 0