From the first table:
1) [tex]n(\text{Under 40 and Internet})=54;[/tex]
2) [tex]n(\text{Under 40 and Cable})=81;[/tex]
3) [tex]n(\text{40 or older and Internet})=23;[/tex]
4) [tex]n(\text{40 or older and Cable})=92.[/tex]
Then you can fill the second table:
1)
[tex]p(\text{Under 40 and Internet})=w=\dfrac{54}{250}=0.216;[/tex]
2)
[tex]p(\text{Under 40 and Cable})=y=\dfrac{81}{250}=0.324;[/tex]
3)
[tex]p(\text{40 or older and Internet})=x=\dfrac{23}{250}=0.092;[/tex]
4)
[tex]p(\text{40 or older and Cable})=z=\dfrac{92}{250}=0.368.[/tex]
Answer: she should use for [tex]x=0.092\approx 0.09.[/tex]
