78 vote
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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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
1). 140
2). 120
3). 200
4). 160
3 answers
32 vote
Answer for this question is option 1
60 vote
Total students = 6x + x = 7x
$\therefore\frac{6x+6}{x-6}$ = $\frac{9}{1}$
=> 6x + 6 = 9x– 54
=> 9x – 6x = 54 + 6 = 60
=> 3x = 60
=> x = 20
$\therefore$ Total number of students = 7 × 20 = 140
31 vote
Look the ratio 6:1 and 9:1 so we have to find the multiple of 7&10 both and that is only one 140 so to save your time in examination answer is 14O... that's it