The following table presents the probability distribution of…
The following table presents the probability distribution of the number of vacations X taken last year for a randomly chosen family. x (# of vacations) 0 1 2 3 4 Frequency 10 40 30 15 5 1. What is the probability that a family had exactly three vacations? 2. What is the probability that a family had at least three vacations? 3. What is the mean of the probability distribution? 4. What is the variance of the probability distribution?