Question 8
A farmer asks his son to select five watermelons to sell at the weekly market. They are sold by weight, so they must be weighed before the trip. By mistake, the son weighs them in pairs instead of individually. The ten pair weights, in pounds, are 20, 22, 23, 24, 25, 26, 27, 28, 30 and 31. How much does each watermelon weigh?
