l. a) Determine the number of permutations of 20 things, taken four (4) at a time. b) Determine the number of combinations of 20 things, taken four (4) at a time. 2. Sums for Rolling a Pair of Dice. Consider the sample space of sums for rolling a pair of dice. Find the probability for each outcome as a simplied fraction. Find the odds in favor for each outcome. a) P (5) = Odds in favor: b) P (9 or greater) = Odds in favor: c) P (between 4 and 8) = Odds in favor: 3. Find the mean, median, and mode for the given data set. Round the mean to the nearest tenth, If needed. 42 15 8 9 l3 6 7 21 37 50 26 32