Final answer:
To calculate the number of different lunch combinations, multiply the number of sandwiches, chips, and beverages options together, which are 6, 3, and 5 respectively, resulting in 90 different lunch combinations.
Step-by-step explanation:
To find the number of different lunch combinations that can be ordered from a menu with 6 different sandwiches, 3 choices of potato chips, 3 types of salad, and 5 different beverages, we use the principle of counting. Each lunch combination consists of one sandwich, one type of chips, and one beverage.
To determine the total number of unique combinations, we multiply the number of options for each category together.
The calculation is as follows:
- 6 sandwiches
- 3 types of chips
- 5 beverages
Therefore, the number of different lunch combinations is:
6 (sandwiches) × 3 (chips) × 5 (beverages) = 90 different combinations.
So the correct answer is C) 90.