⚠️⚠️ help me I’m confused it’s not 10 or 3 (i think) and the last two don’t seem to work when I attempted so ifkfkfkfododos

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 me out here and the tell me the greatest common factor

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'