Total number of flashlights = 180.
Number of defective flashlights = 9.
Number of working flashlights = 180 - 9 = 171.
The probability of selecting a working flashlight is the number of working flashlights divided by the total number of flashlights.
P(working) = 171 / 180 = 19 / 20 = 0.95.
Ответ: 0.95