Express the indicated degree of likelihood as a probability value between 0 and 1 .
When using a computer to randomly generate the last digit of a phone number to be called for a survey, there is 1 chance in 10 that the last digit is zero.
The probability is
(Type an integer or a decimal. Do not round.)

Step 1 ：The problem is asking for the probability of a single event occurring, which is the last digit of a randomly generated phone number being zero. In this case, the total number of possible outcomes is 10 (digits from 0 to 9), and the number of favorable outcomes is 1 (the digit being zero).

Step 2 ：The probability of an event is calculated by dividing the number of favorable outcomes by the total number of outcomes.

Step 3 ：Let's denote the number of favorable outcomes as \(f\) and the total number of outcomes as \(t\). In this case, \(f = 1\) and \(t = 10\).

Step 4 ：The probability \(P\) is then calculated as \(P = \frac{f}{t}\). Substituting the values we have, \(P = \frac{1}{10} = 0.1\).

Step 5 ：Final Answer: The probability that the last digit of a randomly generated phone number is zero is \(\boxed{0.1}\).