Chapter 13, Problem 7PT

To determine

Find the combinations of settings .

Answer to Problem 7PT

144 ways

Explanation of Solution

Given:

An engineer is analyzing three factors that affect the quality of semiconductors : temperature, humidity, and material selection. There are 6 possible temperature settings, 4 possible humidity settings, and 6 choices of materials.

Calculation:

All the events are independent.

Number of temperature settings = 6

Number of humidity settings = 4

Number of choices of materials = 6

So, total number of combinations = $6\cdot 4\cdot 6=144$

So, there are 144 ways of combining the settings.