Consider the experiment of rolling a pair of fair dice multiple times. So each experiment is the roll of a pair of dice. You keep rolling the pair until you get a pair of sixes. You stop after you get a pair of sixes and check how many times you rolled the pair of dice. The random variable X is the number of times you rolled the pair. What is the probability that you rolled the pair 7 times?Consider the PMF below where c is an unspecified constant. Px (x) = c/x x = 2, 4,8, 10 otherwise. Which of the following is incorrect? O X is a nonnegative random variable. O. P[X=4]=2/7 O P[X a] where a=0.89.Consider the CDF of a random variable X given below. Note that the CDF is described by a straight line with a slope of 0.5 in the region -1 1. Find P [X