Final answer:
Evelyn would jar 20 liters of jam in 5 days.
Step-by-step explanation:
Since the relationship between the amount of jam and the number of days is directly proportional, we can use proportions to solve this problem. Evelyn jarred 12 liters of jam in 3 days. To find out how much jam she would jar in 5 days, we can set up a proportion: 3/12 = 5/x, where x is the amount of jam she would jar in 5 days. Cross-multiplying and solving for x, we find that x = 20 liters.
Learn more about proportions in mathematics