Answer of 16,18,20,22,24

SAT Test. In Exercises 15-20, assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are n = 8 trials, each with probability of success (correct) given by p = 0.20. Find the indicated probability for the number of correct answers. 15. Find the probability that the number x of correct answers is exactly 7. 16. Find the probability that the number x of correct answers is at least 4. 17. Find the probability that the number x of correct answers is fewer than 3. 18. Find the probability that the number x of correct answers is no more than 2. 19. Find the probability of no correct answers. 20. Find the probability that at least one answer is correct. In Exercises 21-24, assume that when adults with smartphones are randomly selected, 54% use them in meetings or classes (based on data from an LG Smartphone survey). 21. If 8 adult smartphone users are randomly selected, find the probability that exactly 6 of them use their smartphones in meetings or classes. 22. If 20 adult smartphone users are randomly selected, find the probability that exactly 15 of them use their smartphones in meetings or classes. 23. If 10 adult smartphone users are randomly selected, find the probability that at least 8 of them use their smartphones in meetings or classes. 24. If 12 adult smartphone users are randomly selected, find the probability that fewer than 3 of them use their smartphones in meetings or classes. In Exercises 25-28. find