If your trying to find the mean(average) median and mode then first you have to put the numbers in order: 0, 5, 6, 6, 6, 7, 8, 9, 12. To find the mode it's the number that repeats most which in this case is 6. The median is the middle number which in this case is also 6. And the mean or average is found by adding all the numbers and dividing the sum by the amount of numbers which in this case is 9. So when you add all the numbers you should get 59. Then when you divide 59 by 9 you get 6.55555556 and once you round that you get about 6.5 or 6 and a half miles is the average Mary jogged in those 9 days.