3-1.
hom is conducting a survey for the school newspaper. He
ved 175 students at his school and found that 28 students
d the new iPhone, 44 students had a #Pad computer, and 110
udents had neither. Pham then made a Venn diagram to
illustrate the information.
*Phone
21
)
TtPad
37
Neither 110
a.
How did Pham determine the number of students who
have both Phones and iPads?
How many students have Phones or Pads? How did he find this?
Recall that 28 students had the new iPhone and 44 students had a Pad. Why cannot
Pham just add 28 +44 to get the answer to part (b)? Explain.