Question: Market researcher Gartner Dataquest reports that Dell Computer controls 27% of the PC market in the United States. Suppose a business researcher randomly selects 130 recent purchasers of PC.
a. What is the probability that more than 39 PC purchasers bought a Dell computer?
b. What is the probability that between 28 and 38 PC purchasers (inclusive) bought a Dell computer?
c. What is the probability that fewer than 23 PC purchasers bought a Dell computer?
d. What is the probability that exactly 33 PC purchasers bought a Dell computer?