80
75 + 70 + 80 = 225
80 + 85 + 90 = 255
225 + 255 = 480
six numbers so 480 / 6 = 80
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Median of the set = arithmetic mean of 75 and 85 = 80
73.75
70, 75, 80, 85, 90 and 95.
65, 70, 75, 80, 85.
The average of 80, 80 and 95 is 85.