I have done B) but does anyone know the answer to A)

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.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827