Approximately 10% of all people are left-handed ("11 little-known facts," 2013). Consider a grouping of fifteen people. A. ) State the random variable. X = ____________________________ b. ) Show that this is a binomial. Find the probability that c. ) None are left-handed. D. ) Seven are left-handed. E. ) At least two are left-handed. F. ) At most three are left-handed. G. ) At least seven are left-handed. H. ) Find the mean of X. I. ) Find the variance of X. J. ) Find the Standard deviation of X