Worldwide, there are almost ___ mobile phones in use, ___ of which are smartphones.
a. 3 billion; 47 percent
b. 4 billion; 37 percent
c. 5 billion; 27 percent
d. 6 billion; 17 percent
e. 7 billion; 7 percent
ANSWER: d
Worldwide, there are almost ___ mobile phones in use, ___ of which are smartphones.
a. 3 billion; 47 percent
b. 4 billion; 37 percent
c. 5 billion; 27 percent
d. 6 billion; 17 percent
e. 7 billion; 7 percent
ANSWER: d