Julie designs gardens for a living. For a year she kept track of the amount of time she spent designing the garden and whether or not the customer returned. She recorded the time and probability that a customer returned.

Given that her work is profitable ONLY if she spends fewer than 3.5 hours designing, what is the best amount of time she should spend per customer?
A)
1-2 hours
B)
2-3 hours
C)
3-4 hours
D)
4-5 hours

Question

Julie designs gardens for a living. For a year she kept track of the amount of time she spent designing the garden and whether or not the customer returned. She recorded the time and probability that a customer returned. 

Given that her work is profitable ONLY if she spends fewer than 3.5 hours designing, what is the best amount of time she should spend per customer?
A)
1-2 hours
B)
2-3 hours
C)
3-4 hours
D)
4-5 hours

anonymous · Answer

Time designing	Probability of return
1 - 2 hours	5/8
2 - 3 hours	5/9
3 - 4 hours	7/8
4 - 5 hours	3/4
5 - 6 hours	1/2
6 - 7 hours	3/7
7 - 8 hours	2/9

(this is a graph)

anonymous · Answer

its C.