iscrete Probability Distributions Identifying Probability Distributions. In Exercises 7-14, determine whether a prob- ability distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, identify the requirements that are not satisfied. 11. Fun Ways to Flirt A sociologist randomly selects single adults X for different groups of three, and the random variable x is the num- P(x) ber in the group who say that the most fun way to flirt is in person 0 0.091 (based on a Microsoft Instant Messaging survey). 0.334 2 0.408 3 0.166