SOLUTION: A computer randomly generates the last digit of a telephone number. What is the probability that the outcome is an 8 or a 9?

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Question 1189088: A computer randomly generates the last digit of a telephone number. What is the probability that the outcome is an 8 or a 9?
Answer by Boreal(15235) About Me  (Show Source):
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There are 10 last digits, so the probability of 8 or 9 is 2/10 or 1/5.