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What is the number of candidates who passed the examination ?

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The average of marks obtained by 120 candidates was 35. If the average of passed candidates was 39 and that of failed candidates was 15.
What is the number of candidates who passed the examination ?

posted Aug 18, 2015 by Sandeep Otari

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1 Answer

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The difference between the low and average is 20, between the high and average is 4. Therefore the ratio passed / failed is 5 : 1.
Of the 120 candidates 100 passed and 20 failed.

answer Aug 18, 2015 by Jcm

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