A particularly long traffic light on your morning commute is green 40% of the time that you approach it. Assume that each morning represents an independent trial. Let denote the number of mornings the light is green. Over 10 mornings, what is the probability that the light is green on exactly 4 days? Round your answer to three decimal places.
a) 0.250
b) 0.179
c) 0.310
d) 0.101