In setting up a manufacturing process for a new computer memory storage device, the initial configuration has

Question:

In setting up a manufacturing process for a new computer memory storage device, the initial configuration has a 16% yield: 16% of the devices are acceptable and 84% are defective. If 12 of the devices are made, what is the probability of getting at least 1 that is good? If it is very important to have at least 1 good unit for testing purposes, is the resulting probability adequate?