Weegy: 15% of 20 is 3, so twenty pounds of a salt-water solution that contains fifteen percent salt contains 3 lb of salt. User: Twenty pounds of a salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to twelve percent salt?
3 lb
5 lb
12 lb Weegy: There is 3 lb of salt in the 20 lb of solution. If 3 lb is to be 12%, 100% is (3/12) x 100 = 25 lb in total. So 5 lb of water needs to be added. (More)

Weegy: the mean of the following data set. 42, 45, 58, 63 is (42 + 45 + 58 + 63)/4 = 52, thus the mean of the following data set. 42, 45, 58, 63 is c.)52
User: Find the mean of the following data set.
42, 45, 58, 63.
42
47
52 Weegy: the mean of the following data set. 42, 45, 58, 63 is (42 + 45 + 58 + 63)/4 = 52, thus the mean of the following data set. 42, 45, 58, 63 is c.)52
User: Based on the data set shown, which of the following ... (More)