There are 13 cards of spade & 13 cards of heart in a pack of 52 cards. The probability that the card one is a spade and one is a heart = 13C1 x 13C1/(52C2) = 13/102
A container has only two types (P and Q) of oil in the ratio 3:2 respectively. When 90 litre of oil Q is added to the containerthe quantity of oil P bec...
In a mixture of alcohol & water, 30 litres water is mixed due to which ratio changes from 3:4 to 1:2. Find initial quantity of mixture. (in l...
One alloy of steel contains 74% Iron and 26% carbon. Another alloy contains 81% Iron and 12% carbon. Later, they are mixed, so that the mixture contains...
What is the total initial quantity of the mixture if it originally had petrol and diesel in an 8:7 ratio, and after removing 315 ml of the mixture and a...
The ratio of quantity of milk and water in a 300 litres mixture is 6:4, respectively. On removing 'M' litres of mixture the difference between the quant...
A vessel is completely filled with milk. If 33% of the milk is replaced with water then only 603 ml of milk will be left in the vessel. What is the tota...
From a cask filled with wine, 108.75 liters are first drawn and replaced with water. From this mixture 87 liters are drawn and replaced with water. The ...
A vessel is completely filled with milk. If 35% of the milk is replaced with water then only 184.6 ml of milk will be left in the vessel. What is the to...
A shopkeeper buys 40 kg of sugar at ₹30 per kg and 60 kg of sugar at ₹35 per kg. He mixes them and sells the entire quantity at ₹40 per kg. If his...
A mixture contains ‘X’ liter milk and ‘Y’ liter water. If 30 liter of mixture is taken out and replaced with water, then the quantity of milk an...
