Total output of one unit — Tables & Charts Aptitude Question
Total output of one unit: Monthly production, in units: | Month | Unit A | Unit B | Unit C |… Answer and worked solution on CodeKairo.
- Topic: Tables & Charts
- Section: Data Interpretation
- Difficulty: Easy
- Time target: 50 seconds
Question
Monthly production, in units:
| Month | Unit A | Unit B | Unit C |
|---|---|---|---|
| January | 400 | 300 | 500 |
| February | 450 | 350 | 400 |
| March | 500 | 400 | 600 |
| April | 550 | 450 | 450 |
What was Unit B's total production over the four months?
Options
- 1,400
- 1,500
- 1,600
- 1,700
Show the answer and the worked solution
Correct answer: B. 1,500
Worked solution
- 300 + 350 + 400 + 450 = 1,500.
Answer: 1,500.
The idea
Read down the named column. The figures here rise by 50 each month, which is a quick check on the addition.
Shortcut. Unit B rises by 50 a month, so its total is (first + last) × 4 ÷ 2 = (300 + 450) × 2 = 1,500.
Common trap. 1,600 — multiplying March's 400 by four as if it were the average; the average of 300 to 450 is 375.