first, and very important, u have to put ur numbers in order
11,18,23,32,33,(41,41),54,56,58,67,70
the median is the middle number.....and if u have an odd number of numbers, it is easy to find...but when u have an even number of numbers...like this problem has 12 numbers, there will be 2 middle numbers....u take those 2 middle numbers and divide by 2 to get the median.
ur 2 middle numbers are 41 and 41.....add them and divide by 2 to find the median....(41 + 41) / 2 = 82/2 = 41 <== ur median