Author Question: Each time a class meets, the professor selects one student at random to explain the solution to a ... (Read 75 times)

CharlieWard · **on:** Jul 24, 2018

Each time a class meets, the professor selects one student at random to explain the solution to a homework problem. There are 60 students in the class, and no one ever misses class. Luke is one of these students. What is the probability that Luke is selected both of the next two times that the class meets?
1.0.00028
2.0.03333
3.0.5
4.0.01724
5.0.00015

Question 2

Suppose you want to estimate the probability that a randomly selected customer at a particular grocery store will pay by credit card. Over the past 3 months, 70,600 purchases were made, and 22,200 of them were paid for by credit card. What is the estimated probability that a randomly selected customer will pay by credit card?
1.0.3144
2.0.5391
3.0.7233
4.0.8548
5.0.8633