A random sample of 50 students from a high school with 1000 students surveyed each student is asked what science class he or she is taking an all the students at the school take science the table shows the responses based on the survey results which statement about all the students at the high school is most accurate A)twice as many sudents at the high school edition biology then taking chemistry B) about 10% of the students at the high school are taking chemistry C) and a group of 25 students at the high school it is expected that one of the students are taking earth science, D) estimated that about 120 of the students at the high school are taking physics

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?