Question

Craig is making 3 recipes for his party. He has a containerof flour on his kitchen scale. The table shows the totalchange in weight of the flour on the scale after each ofthe 3 recipes. What is the average change in the amountof flour, in ounces, used in the 3 recipes?

Answer 1

Answer:

C

Step-by-step explanation:

The average change in the amount of flour is the sum of the changes after each recipe divided by the number of recipes.

Sum of changes:

$-2-3\frac{1}{2}-4\frac{1}{2}=-2-\frac{3\ast2+1}{2}-\frac{4\ast2+1}{2}=-2-\frac{7}{2}-\frac{9}{2}$$-2-\frac{7}{2}-\frac{9}{2}=-2-\frac{7+9}{2}=-10$

Average:

3 recipes.

Total is -10.

-10/3 = 3 with rest 1. So as a mixed number, the correct answer is option C.