OE


If the replacement of one player by another lowers the average weight by 2 pounds, you can conclude that the sum of the 5 weights must have dropped by 2 x 5, which equals 10. This is because the average equals the sum divided by the number of terms.

Based on the 10-pound drop in total weight, you can further conclude that the heaviest lineman, who weighed 321 pounds, must have been replaced by a teammate who weighs 311 pounds and is now the heaviest of the group. The range of weights is found by subtracting the weight of the lightest lineman (295 pounds) from 311:

311 - 295 = 16.