SOLUTION: What are the odds that a randomly selected number between 1 and 100 will not have a digit 5?

Algebra.Com
Question 370400: What are the odds that a randomly selected number between 1 and 100 will not have a digit 5?
Found 2 solutions by Edwin McCravy, sgudihal:
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
Yes I botched this one :-)  (My face is red!)

However the other tutor botched it too, in another way.

The odds in favor are    

number of successful choices : number of unsuccessful choices

or

81:62 

(not 81:100).

Edwin
Answer by sgudihal(1)   (Show Source): You can put this solution on YOUR website!
In the solution given above,
we have to include other numbers like 51, 52,53, 54, 55(already included by tutor), 56, 57, 58 and 59 apart from the 10 mentioned
So that makes it 19 and the odds then are
81:100
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