An integer x, with 10 <= x <= 99, is to be chosen. If all choices are equally likely, what is the probability that at least one digit of x is a 7?

Guest Jul 5, 2019

edited by
Guest
Jul 5, 2019

edited by Guest Jul 5, 2019

edited by Guest Jul 5, 2019

edited by Guest Jul 5, 2019

edited by Guest Jul 5, 2019