The ratio of successful and unsuccessful examines in an examination in a school is 6:1. The ratio would have been 9:1 if 6 more examines had been successful. The total number of examines is
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Total students = 6x + x = 7x
∴6x+6x−6∴6x+6x−6 = 9191
=> 6x + 6 = 9x– 54
=> 9x – 6x = 54 + 6 = 60
=> 3x = 60
=> x = 20
∴∴ Total number of students = 7 × 20 = 140
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