Median and Mean

I am learning to find the median and the mean . This is how you have to play it. They tell you put it in order from biggest to smallest and the numbers are in percentages. You have to find out the median and the median is in the middle so then you have to add 59 and 51. Then you have to divide it by 2.  My answer was 55. To find the mean you have to add all of the numbers then divide it by 10. My answer was 47.1 .This game was hard because you to add all the numbers and divide them after. I want to learn about LCM and HCF next.