Final answer:
To find the percentage of cars with a fuel efficiency less than 28 mpg, count the number of cars below this threshold and divide by the total number of cars, then multiply by 100. In the provided list, there are 3 cars out of 10 that meet this criterion, resulting in 30% of the cars having a fuel efficiency less than 28 mpg.
Step-by-step explanation:
To determine the percentage of cars with a fuel efficiency less than 28 mpg (miles per gallon) from the list of 10 new cars provided, we identify all the cars that have an mpg rating below 28. The list is as follows: 28, 24, 29, 18, 13, 43, 38, 14, 49, 32. The cars with fuel efficiencies less than 28 mpg are three in total: 24, 18, and 13 mpg.
Next, we calculate the percentage by dividing the number of cars with less than 28 mpg by the total number of cars, and then multiplying by 100 to convert it into a percentage:
Percentage = (Number of cars with < 28 mpg / Total number of cars) × 100
Percentage = (3 / 10) × 100
Percentage = 30%
Thus, 30% of these cars have a fuel efficiency less than 28 mpg.