Avg and Median -> scenario where they are grossly apart?

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Can someone cite a "real-world" scenario (something palpable, more easily understood by poorly-educated folks) where the median and the average are grossly far apart and using the average could lead to a bad outcome?

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Suppose you have five numbers: 8, 10, 75, 78, 79. The median is 75 because it lies in the middle of the set. However, the average is only 50, being equal to (8 + 10 + 75 + 78 + 79)/5 = 250/5. The average is low because you have two extremely small numbers, and the differences between the three other numbers are small.