Hello, thanks for asking. If you look at the x-axis of the second plot, you can read the number of trials, which starts from 3, since we cannot have 3 successes out of less than 3 trials.

Intuitively, it is unlikely (unless you are very lucky) that you obtain your 3 success in your first 3 trials (it would mean that each trial has been a success!). But, as the number of trials increases (up to a certain number of trials) your chances increase as well.