Answer:
43.5
Explanation:
First order them least to greatest and then find the median or the middle, after that find the Q1 or the middle of the left side which is 7.5 in this case. And Q3 on the write side is 51 since the middle of 51 and 51 is 51 since it is the same number. Finally subtract 51-7.5 which equals 43.5