barons "A salad bar has 7 ingredients, excluding the dressing. How many different salads are possible where two salads are different if they don't include identical ingredients?"

 128

Step-by-step explanation:

Given : Total ingredients =7

When we select any one of ingredient for salad, then total choices for each ingredient = 2 (Yes or No)

So for all 7 ingredients there will be choices [By fundamental principle of counting]

Hence, there are 128 different salads are possible where two salads are different if they don't include identical ingredients

To find the range, you order the list from least to greatest and then you subtract the lowest number from the highest. In this case, 39 - 19

To find the mean, you add up all of the numbers and then you divide the sum by the amount of numbers that are in the list. In this case, 220 / 8

The answers are 20 (range) and 27.5 (mean)