Final answer:
The standard liquor portion for a Rum and Coke is typically 1.5 ounces of rum to 4-6 ounces of cola, creating a 1:2 or 1:3 ratio. These proportions can be adjusted based on personal taste preferences.
Step-by-step explanation:
The appropriate liquor portion for a Rum and Coke, also known as a Cuba Libre, typically consists of a 1:2 or 1:3 ratio of rum to cola. This usually translates to about 1.5 ounces (or one shot) of rum to 4-6 ounces of cola for a standard serving. However, the exact proportions can be adjusted according to personal preference or serving size. For example, someone may prefer a stronger or weaker drink and alter the amount of rum or cola accordingly. In a bar setting, bartenders tend to follow the standard ratios to maintain consistency and control over alcohol consumption.