What does the ratio 4:18 represent in this situation?

Plz me i need i will give a brain

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Factor and solve to find roots x squared -x - 90 =0