Answer:
81
Step-by-step explanation:
For more questions like this:
order numbers from smallest to largest:
73, 75, 75, 81, 82, 83, 84
Next, find the central number:
73, 75, 75, 81, 82, 83, 84 (remove one number from either side at the same time, so remove 73 and 84, and then 75, and 83)
If the list consist an even number, take the two central numbers, and find the number that is in the exact middle of it.
ex: 1,2,3,4,5,6
central numbers: 3, 4
median : 3.5
