In how many ways can a quality-control engineer select a sample of3 transistors for testing frm a batch of 100 transistors?

161700 ways.

Step-by-step explanation:

The order in which the transistors are chosen is not important. This means that we use the combinations formula to solve this question.

Combinations formula:

is the number of different combinations of x objects from a set of n elements, given by the following formula.

In this question:

3 transistors from a set of 100. So

So 161700 ways.