Average daily sales — Caselets Aptitude Question
Average daily sales: A shop was open for six days last week and sold 1,200 items in all. Answer and worked solution on CodeKairo.
- Topic: Caselets
- Section: Data Interpretation
- Difficulty: Easy
- Time target: 60 seconds
Question
A shop was open for six days last week and sold 1,200 items in all. The daily figures were:
- Monday: 150
- Tuesday: 200
- Wednesday: 180
- Thursday: 220
- Friday: 250
- Saturday: 200
What were the average daily sales over the six days?
Options
- 180
- 190
- 200
- 210
Show the answer and the worked solution
Correct answer: C. 200
Worked solution
- Total = 150 + 200 + 180 + 220 + 250 + 200 = 1,200.
- Average = 1,200 ÷ 6 = 200.
Answer: 200.
The idea
The caselet states the weekly total, so the addition is only a check. Divide by the number of days actually listed, not by seven.
Shortcut. Measure from 200: −50, 0, −20, +20, +50, 0 sum to zero, so the average is 200.
Common trap. 180 — the option nearest 1,200 ÷ 7 ≈ 171, which comes from dividing by a full week; the shop opened only six days.