Using it's concept, it is found that there is a [tex]p = \frac{9}{107}[/tex] probability that the next customer will pay with a debit card.
A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, there were 39 + 9 + 59 = 107 purchases, of which 9 were paid with debid cards, hence:
[tex]p = \frac{9}{107}[/tex]
There is a [tex]p = \frac{9}{107}[/tex] probability that the next customer will pay with a debit card.
More can be learned about probabilities at https://brainly.com/question/14398287