The set S’ = {n : n is an integer, 1 le ...

The set S’ = {n : n is an integer, `1 le n le 50`}. If an element of S is selected at random, find the probability that it does not contain the digit '2' at all.

`(7)/(25)`

`(18)/(25)`

`(17)/(50)`

`(7)/(10)`

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