Final answer:
To determine which is a better deal, compare the price per liter. The first option is a better deal as it has a lower price per liter ($1.80) compared to the second option ($1.90).
Step-by-step explanation:
To determine which is a better deal, we need to compare the price per liter for each option.
For the first option, 1.5 liters for $2.70, the price per liter can be found by dividing the total cost by the number of liters: $2.70/1.5 = $1.80 per liter.
For the second option, 2 liters for $3.80, the price per liter is $3.80/2 = $1.90 per liter.
Therefore, the first option is a better deal as it has a lower price per liter ($1.80) compared to the second option ($1.90).