Tickets for this year's musical production cost $12 for adults and $8 for students. The show earned $4080 total for two shows.
a. Write an equation to represent the relationship between the number of adult
tickets sold and the number of student tickets sold.
b. Rearrange your relationship to isolate the variable representing the number of
student tickets.
c. If no adults purchased tickets, how many student tickets were sold?

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?