Question
Ravi visits an electronics store with a certain amount
of money. He can buy 50 USB drives or 25 headphones with the money he has. However, he decides to save 20% of the amount for a concert ticket and buys 10 headphones and some USB drives. Calculate the percentage of USB drives he can now purchase out of the initial number of USB drives he could have bought.Solution
ATQ Let the amount of money with Ravi be Rs. '100a' So, the price of 1 USB drive = (100/50) = Rs. '2a' Also, the price of 1 headphone = (100/25) = Rs. '4a' ATQ; Amount retained for the concert ticket = 0.20 X 100a = Rs. '20a' Price of 10 headphones = 10 X 4a = Rs. '40a' Remaining amount = 100a - 20a - 40a = Rs. '40a' So, number of USB drives he can purchase now = (40a/2a) = 20 Therefore, required percent = (20/50) X 100 = 40%
A container holds 260 liters of a solution of milk and water mixed in the ratio of 7:6 respectively. ‘x’ liters of this solution is drawn out and re...
A container was filled with pure milk. A person removed 10 litres of milk and refilled it with water to hide the act. He repeated the same act once agai...
A mixture contains alcohol and water in the ratio 5:4. When 30% of this mixture is transferred to container C, the amount of alcohol in container C is 6...
A mixture of 40 litres of milk and water contains 10% water. How much water should be added to it to increase the percentage of water to 25% ?
A mixture contains 45 ml water and rest ‘x’ ml milk. When 0.3x ml of water is added, the water becomes 3/7th of the mixture. Find the value of ‘x�...
450 ml of a mixture contains milk and water in the ratio of 15 respectively. If 70 ml of water and 80 ml of milk are added into it, then the ratio of mi...
A 309 litre mixture consists of milk, water and honey. In the mixture, the quantity of milk is 30% more than that of honey and the quantity of water is ...
- A jar contains milk and water in the ratio 6:5. After 22 litres of water is added, the new ratio becomes 6:7. Calculate the final amount of the mixture.
A jar contains a mixture of milk and water in the ratio 1:3, respectively. If 7-litres of the mixture is taken out, then the quantity of water left in t...
A container holds a mixture of petrol and diesel in the ratio 11:5. If 32 litres of the mixture is removed and replaced with 4 li...
Relevant for Exams:
