In discussions about statistics and probability, success is often defined as “at least one success.” This is because, in multiple attempts, the focus is on whether one success occurs.

For example:

Job hunting: If you apply to 10 companies, as long as one company hires you, you can consider that you’ve “successfully found a job.” Even if the other 9 companies reject you, the outcome is still regarded as “success.”

In this context, success is defined by a single success or at least one success.