What is the probability that a 7-digit phone number contains at least one 8? (Repetition of numbers and lead zero are allowed).

Let's compute the probability that a 7-digit phone number does not contain 8s, at all.

This means that, for each of the 7 digits, we have 9 choices (the ten digits except 8).

So, there are 7-digit phone numbers that don't contain 8s.

Note that the total number of 7-digit phone numbers is , because we have 10 choices (the ten digits) for each of the seven slots.

So, the probability of finding a phone number with no 8s is

This implies that the probability that a 7-digit phone number contains at least one 8 is the complementary probability

ok so the answer to your question is simple as long as you look at the different dimensions that contain the exemplary letters that combined in the right order give you words that eventually within the 5th dimension will conform and give you the correct answer to your question. hope i , stop looking at this easily, look at it with a spectral view.

step-by-step explanation:

told you