Total = 25 + 10 + 15 = 50
Green = 25
P(green) = 25/50 = 1/2
Answer: 1/2
I think you forgot to add your table
Welp, it can't get any easier. Now, they give you the value for l (length which is 12.9) and the give you the value for w (width which is 19.3)
Now, you'd just plug them in. So
P = 2(12.9) + 2(19.3)
=25.8+38.6
=64.4ft