Approximately 10% of all people are left-handed. consider a grouping of fifteen people. a.) state the random variable. x = number of people left-handed out of 15 people. b.) write the probability distribution. c.) = p(x=r)=c n/p^r q^n-r n/r= n! /r! n-r! d.) draw a histogram. x: value of random variable y: probability associated with that random variable. e.) describe the shape of the histogram. f.) find the mean. g.) find the variance. h.) find the standard deviation.