Asked by Pleasecheckmyanswer

Jason remembers nine digits of a ten digit phone number. He remembers that the last digit is an even number. If he guesses that last digit, what is the probability that he dials the correct number?

My answer: 1/5 probability
Answered by Steve
why 1/5? 5 of the 10 digits are even.
Answered by Pleasecheckmyanswer
how do I do it then?
Answered by Pleasecheckmyanswer
fyi this is actually right

Assuming 0 counts as an even digit, then the last digit must be 2, 4, 6, 8, 0 = 5 options
Only one of these is the correct one
Therefore the probability that he dials correctly = 1/5 or 0.20 or 20%
Answered by Steve
My bad. You are correct.
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