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The ratio of successful and unsuccessful examinees in an examination in a school is 6 : 1. The ratio would have been 9 : 1 if 6 more examinees had been successful. The total number of examinees is
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- 140
- 120
- 200
- 160
Correct Option: A
Total students = 6x + x = 7x
| ∴ | = | ||
| x − 6 | 1 |
⇒ 6x + 6 = 9x– 54
⇒ 9x – 6x = 54 + 6 = 60
⇒ 3x = 60 ⇒ x = 20
∴ Total number of students
= 7 × 20 = 140
