Every 3 days william has to take medication for his back. every 7 days he has to take medication for asthma. on what day will william take both medications?

15 points ! ~ see if you know the answer to both you!

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.

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?