Question

Mrs. Johnson went to the grocery store every week for five weeks. The table shows how much she spent each week.

What is the average amount Mrs. Johnson spent per week?

Answer 1

Answer: $70/week average

Explanation:

47+96+78+61+68= 350

350/5=70

To find the mean of a set of values, you add them all up and divide by the # of values.

Answer 2

$70

General Formulas and Concepts:

Pre-Algebra

• Order of Operations: BPEMDAS

Statistics

• Mean:
  `(total \ amount)/(total \ things)`

Explanation:

Average amount during the 5 weeks can be calculated using mean.

Step 1: Define

Total amount: 47 + 96 + 78 + 61 + 68

Total weeks: 5

Step 2: Find Average

1. Substitute:
   `(47 + 96 + 78 + 61 + 68)/(5)`
2. Add:
   `(350)/(5)`
3. Divide:
   `70`

And we have our final answer!