Use the frequency distribution, which shows the number of American voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range.

Ages	FrequencyFrequency
18 to 20	4.1
21 to 24	7.4
25 to 34	21.1
35 to 44	24.3
45 to 64	53.6
65 and over	27.2

The probability that a voter chosen at random is in the 18 to 20 years old age range is ___

.(Round to three decimal places as needed.)