Question

The wheat sold by a grocer contained 10% low quantity wheat. What quantity of good quality wheat should be added to 150 Kg of wheat so that the percentage of low quality wheat become 5%?

• A. 150 Kg
• B. 135 Kg
• C. 50 Kg
• D. 85 Kg
• E. None of these

Answer 1

The correct option is A 150 Kg

Good quality content in 150 Kg of wheat =90% of 150 =135 Kg
$\therefore$ 5% of the new mixture =15 Kg
$\therefore$ New mixture $=\frac{15\times 100}{5}=300Kg$
$\therefore$ Good quality of wheat added =(300-150)Kg
=150 Kg.