Out of 300 examinees of a school the ratio of successful to unsuccessful students is 5:1. How many more students have to be successful so that the ratio of successful to unsuccessful students becomes 9:1?
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no.of successful=5/6*300=250(1st ratio 5:1)
no.of successful=9/10*300=270 (2nd ratio9:10)
increase in student=270-250=20
ans)20 students
no.of successful=9/10*300=270 (2nd ratio9:10)
increase in student=270-250=20
ans)20 students
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