I'm pretty sure to solve this all you do is subtract 77.95 - 75.65, which would be 2.30. Hope that helps!
Answer:
a) 0.900
b) 0.400
Step-by-step explanation:
Let I = households getting internet
T = households getting television
Then I = 60%
and T = 80%
(Households that get both services)
a) Households getting at least one service, 
b) Those getting internet only = 
Those getting television only = 
Probability of getting exactly one service = 0.1 + 0.3 = 0.400
1.) Simply to 1/5 and 1/10
2.) put in decimal form 1/5= .2 and 1/10 = .1
3.) Add = .3
Since p varies directly with l,
p = kl (1)
Also, since w varies directly with l,
w = ml
or, l = w/m
Substitute in (1), we get,
p = k (w/m)
= (k/m) w
So, the price varies directly with weight.
That in standard form would be 12