Discrete Random Variables 1. Illustrate 3 ways of arranging the data and hence calculating the mean of the data: ,1 ,5,4,4 ,8 ,7 6,5 ,3 .1 5 ,8 ,47,3 2- Find the mean of the numbers that appear when a die is rolled once? 3- Find the mean of the number of girls in a family with three children. 4- class contains 30 female and 25 male students. The experiment is selecting a student and male student. s- class contains 30 female and 25 male students. 15 students are selected at random one after the other with replacement. X represents the number of males. 6- A coin is tossed fen times, find the probability that four heads will be obtained. 7- A class contains 30 female and 25 male students. 15 students are selected at random one alter the other with replacement. Find the probability that the number of males is 5. 4 A class contains 30 female and 25 male students. 15 students are selected at random one after the other with replacement. Find the probability that the number of females is twice the number of males. 9- A coin is tossed four times, find the mean, variance, and standard deviation of the number of heads that will be obtained. 10- The Statistical Bulletin reported that 2% of all American births result in twins. If a random sample of 8000 births is taken, find the mean, variance, and standard deviation of the number of births that would result in twins