Example 1: Missing value from a total
Last Updated On: Fri Aug 28 2026| Day | Sales |
|---|---|
| Monday | 120 |
| Tuesday | 150 |
| Wednesday | ? |
| Thursday | 130 |
| Friday | 100 |
A "?" marks a missing value.
Additional information
- The total sales for the five days were 600 units.
Question
What were Wednesday's sales?
Solution
- Known sales = 120 + 150 + 130 + 100 = 500.
- Wednesday = 600 - 500 = 100.
- Wednesday's sales were 100 units.