Daphne Galloway

Mathematics

11 March, 12:33

When buying a laptop computer, there are three common features that are often considered by buyers: Event A) tablet screen, Event B) backlit keyboard, Event CC) CD/DVD drive. 25% of the purchasers request a tablet screen (Event A), 50% request a backlit keyboard (Event B), 85% request CD/DVD drive (Event C), 90% request a tablet screen (Event A) or a CD/DVD drive (Event C) or both, 95% request one or more of these three features, Interestingly no one has ever wanted a tablet screen (Event A) and a backlit keyboard (Event B). What is the most popular model of computer? a. A backlit keyboard and a CD/DVD drive but no tablet screen (B and C but not A) b. A tablet screen and a CD/DVD drive but no backlit keyboard (A and C but not B) c. A CD/DVD drive without either a tablet screen or a backlit keyboard (C but not A or B)