Laura randomly pulled a marble from a bag and then replaced it. • After 60 trials, she had pulled the color blue 25% of the trials.
• She had pulled red 15% of the trials.
• The remaining trials she pulled green.
How many times could Laura be expected to pull a green marble after 300 trials?
O A. 150
OB. 120
O C. 180
OD. 100

Which graph depicts the path of a projectile

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?

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?