求教数学题

justdo665

52人选课  选 1 门， 2门， 3门， 4门，  5门以上

                        2人       7人     15人    16 人       14人

问选课数的中数

请问该题的解题思路？

guandream

there are 52 students; thus you just need find out number of chosen courses. in this case, the average between 26th and 27th. the number of the 26th is four courses, and the 27th is four courses. then the midiam is four.