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ICSE Class 9 Answered

In an examination, the ratio of passes to failures was 4:1. Had 30 less appeared and 20 less passed,the ratio of passes to failures would have been 5:1. Find the number of students who appeared for the examination.
Asked by nishabr7 | 12 Sep, 2018, 08:10: PM
answered-by-expert Expert Answer
Let the number of passed stduents be 4x and failed students be x.
Total number of students = 4x + x = 5x
According to the given condition,
new ratio of the number of students passed to fail students is 5 : 1
begin mathsize 16px style fraction numerator 4 straight x space minus space 20 over denominator straight x space minus space 10 end fraction equals 5 over 1 end style
Solving this we gett x = 30.
Total number of students appeared in the examination is 5x = 30 × 5 = 150.
Answered by Sneha shidid | 13 Sep, 2018, 06:56: PM

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