E-readers In 2011, 12% of Americans owned an electronic reader of some sort. Suppose that 43% of people with e-readers read at least 3 books last year, while people without an e-reader, only 11% read...

E-readers In 2011, 12% of Americans owned an electronic reader of some sort. Suppose that 43% of people with e-readers read at least 3 books last year, while people without an e-reader, only 11% read 3 or more books in the course of the year.

a) Explain how these statistics indicate that owning an e-reader and reading 3 or more books are not independent.

b) What’s the probability that a randomly selected American has read 3 or more books?