Attendance over a week — Caselets Aptitude Question
Attendance over a week: A training programme ran for 5 days. Attendance was 80, 92, 76, 88 and 84. Answer and worked solution on CodeKairo.
- Topic: Caselets
- Section: Data Interpretation
- Difficulty: Easy
- Time target: 60 seconds
Question
A training programme ran for 5 days. Attendance was 80, 92, 76, 88 and 84. Anyone attending on a given day counts once for that day.
What was the average daily attendance?
Options
- 82
- 84
- 86
- 88
Show the answer and the worked solution
Correct answer: B. 84
Worked solution
- Total = 80 + 92 + 76 + 88 + 84 = 420.
- Average = 420 ÷ 5 = 84.
Answer: 84.
The idea
Add carefully, then divide once. Pairing figures that sum neatly (80 + 84, 92 + 88) speeds the addition.
Shortcut. Guess 84 and check the deviations: −4, +8, −8, +4, 0 sum to zero, so 84 is the average.
Common trap. 82 — averaging the first and last days (80 and 84), a shortcut that works only when the figures rise evenly.