Question
Among 132 examinees of a certain school, the ratio of
successful to unsuccessful students is 9 : 2, Had 4 more students passed, then the ratio of successful to unsuccessful students will beSolution
the ratio of successful to unsuccessful students is 9 : 2 total number of examines = 132 successful students = (9/11) × 132 = 108 unsuccessful students = (2/11) × 132 = 24 had 4 more students passed successful students = 108 + 4 = 112 unsuccessful students = 24 – 4 = 20 new ratio of successful to unsuccessful students is 112 : 20 28:5
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