RAVISH BOUGHT 100 ARTICLES FOR RS . 4000.HE SOLD 20 OF THEM AT A GAIN OF 5%.AT WHAT GAIN PERCENT MUST HE SELL THE REMAINING ARTICLES SO AS TO GAIN 20% ON THE WHOLE ??
PLEASE GIVE STEP BY STEP EXPLANATION.
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Hence Ravish must sell the remaining articles at 23.75% a gain.
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