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X < C ≤ D < O O > X. Hence conclusion I is true. B > C = Z ≥ Q ≥ O > D ≥ C B > O. Hence conclusion II is true.
An alloy is made of 45% lead, 35% tin, and 20% copper. How much lead should be added to 40 kg of the alloy so that the new alloy contains 55% lead?
If 100 liters of milk solution contains 60% milk, how much milk should be added to make the solution 80% milk?
A mixture of milk and water measures 60 litres. It contains 10% water. How much water should be added to it, so that the water may be 25%?