Suppose that three microchips in a production run of forty are defective. A sample of five is no be selected to be checked for defects.
The number of different samples can be chosen.
Total number of defective productions is 40 and number of chosen products is 5.
From objects number of objects can be chosen randomly in ways.
The number of samples will contain at least one defective chip.
The probability that a randomly chosen sample of five contains at least one defective chip.