9 times x, divided by 4

Three coins are flipped. what is the probability that there will be at least two tails?

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.

An angle that measures between 90 and 180° is called a(,