To find the average add the three numbers together then divide by three.
The answer is 90.
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The median is the average of 85 and 87, that is 86.The median is the average of 85 and 87, that is 86.The median is the average of 85 and 87, that is 86.The median is the average of 85 and 87, that is 86.
add the 3 numbers and divide by 3. The answer is 90.
The average is (98+87)/2 = 92.5
89
87-98 = -11