What factor should be considered when choosing between the median or mean as a description of the "center" of a data set?

Which system of linear inequalities is graphed? can somebody pleasssse

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Could someone with number 1 and 2