To find the mean you have to add all of the numbers then divide by the total number of numbers so-20+28+29+29+31+32+36+41+42=288 then divide by 9=32 therefor the answer to number 1 is d to find the median eliminate the numbers on the outside till you find the middle one 20 28 29 29 31 32 36 41 42 28 29 29 31 32 36 41 29 29 31 32 36 29 31 32 31 therefor the median is 31