A computer randomly generates a 4 character computer password of 3 digits followed by 1 letter.
. Find the probability that an assigned password does not contain p.

Question

A computer randomly generates a 4 character computer password of 3 digits followed by 1 letter. 
. Find the probability that an assigned password does not contain p.

anonymous · Answer

25 of the 26 possibilities for the last letter are not p, so

25 / 26   ... if you want fraction
.9615      ...if you want a decimal

jamanorthi · Answer

Can u kindly show me how u did it?

anonymous · Answer

The 3 digits in the code are irrelevant. We only care about the last character in the code: the letter.
There are 26 possibilities for the last letter, right?
Pr( not a P) = number of letters that are not P / total number of letters
                                           25                    /               26

anonymous · Answer

On average, 25 out of 26 random letter selections, we're not going to get a p

anonymous · Answer

We can be about 96% certain that if we randomly pick a letter, it will not be a p. Make sense?

jamanorthi · Answer

Oh ok thanks