A salesman makes a commission of x percent on the first Rs. 2,000 worth of sales in any given month and y percent on all further sales during that month. If he makes Rs. 700 from Rs. 4,000 of sales of March and he makes Rs. 900 from Rs. 5,000 of sales in April, what is the value of x?
Correct Answer : B
Each of two very large glass jars contains mixtures of nitric acid and distilled water. In one jar there is 5 times as much acid as there is distilled water, and the other jar contains 3 times as much distilled water, as there is acid. In order to fill an empty glass jar of 7 litre volume with half acid and half distilled water, the volume of mixtures in litres to be drawn off from the first jar and the second jar are respectively.
A colony of bacteria in a container grows by each bacterium splitting into 8 next generation bacteria. However, because of environmental conditions only 50 % of the bacteria in a generation can split as above. A colony of first generation was put in container and it was found that the number of 7th generation bacteria was 4096 million. What was found the size of the 1st generation population initially put in the container?
A dealer sold 2 watches for Rs. 500 each. On one watch he made a profit of 10% on its purchase price and on the other he incurred a loss of 10% on its purchase price. The overall gain(+) or loss(-) in the two transactions as per percentage of total purchase price is nearest to