Answer:
C.Greater than 0.75
Step-by-step explanation:
Given
Cu = $120
Co = $360
We know Probability P <= Cu/(Cu + Co)
P = 120/(120 + 360)
= 120/480
= 0.25
P is the probability of unit is will not sold and 1-p is the probability of unit that will sold
1 - p = 1 - 0.25
= 0.75
probability of the last unit being sold should be greater than 0.75