Where boys outnumber girls — Aptitude Question
Where boys outnumber girls: | Stream | Boys | Girls | Total | |------------|------|-------|-------| | Science | 240… Answer and worked solution on CodeKairo.
- Topic: Tables & Charts
- Section: Data Interpretation
- Difficulty: Easy
- Time target: 60 seconds
Question
| Stream | Boys | Girls | Total |
|---|---|---|---|
| Science | 240 | 160 | 400 |
| Commerce | 180 | 120 | 300 |
| Arts | 80 | 220 | 300 |
| Total | 500 | 500 | 1000 |
In how many streams do boys outnumber girls?
Options
- One
- Two
- Three
- None
Show the answer and the worked solution
Correct answer: B. Two
Worked solution
- Science: 240 boys against 160 girls — boys lead.
- Commerce: 180 against 120 — boys lead.
- Arts: 80 against 220 — girls lead.
- So boys outnumber girls in two streams.
Answer: Two.
The idea
Row-by-row comparison, no arithmetic needed. Note that the overall totals are equal, which is why one stream must be lopsided the other way.
Shortcut. Compare boys with half of each stream's total: 240 > 200 and 180 > 150 lead, while 80 < 150 does not.
Common trap. "None" — reading the totals row, where boys and girls are level at 500; equal totals hide two boy-heavy streams balanced by one girl-heavy stream.