The wheat sold by a shopkeeper contained 10% low quality wheat. What quantity of good quality wheat should be added to 150 kg of wheat so that percentage of low quality wheat becomes 5%?

Explanation

Initially low quality wheat=10% of 150=15kg High quality wheat =150-15=135kg 15kg of low quality wheat will be 5% of the final quantity of wheat Final quantity of wheat = 100/ 5 *15 =300 Kg Quality of high quality wheat =300-15 285 Kg High quality wheat 300-15 =285 Kg Wheat added (high quality) =150Kg