0.9 0.8 0.7 095 095 0.95 The above circuit operates if and only if there is a path of functional devices from left to right. The probability each device functions is shown above. Assume that the probability that a device functions does not depend on whether or not other devices are functional. What is the probability that the circuit operates?

A certain tennis player makes a successful first serve 78​% of the time. Assume that each serve is independent of the others. If she serves 9​times, what's the probability she gets​: Part 1 ​a) The probability that she gets all 9 serves in is _______________ ​(Round to three decimal places as ​needed.). Part 2 ​b) The probability she gets exactly 4 serves in is _______________ ​(Round to three decimal places as​ needed.) Part 3 ​c) The probability she gets at least 7 serves in is ______________________ ​(Round to three decimal places as​ needed.) Part 4 ​d) The probability that there are no more than 6 serves in is __________ ​(Round to three decimal places as​ needed.)

O Whats inside of blo. S Watch Cra zy Rich A Car inspection: Of all the registered automobiles in a city, 6% fail the emissions test. Nine automobiles are selected at random to undergo an emissions test. Round the answers to at least four decimal places. Part 1 of 4 (a) Find the probability that exactly four of them fail the test. The probability that exactly four of them fail the test is Part 2 of 4 (b) Find the probability that fewer than four of them fail the test. The probability that fewer than four of them fail the test is Part 3 of 4 (c) Find the probability that more than three of them fail the test., The probability that more than three of them fail the test is

Hi! I pretty much don't understand this problem that was presented on my Statistics class