Question
The average age of A and B is 19 years. If A is to be
replaced by C, the average would be 18 years. The average age of C and A is 20 years. Find the age of A.Solution
A + B = 2 × 19 = 38 yr B + C = 2 × 18 = 36 yr C + A = 2 × 20 = 40 yr On adding all three, 2 (A + B + C) = 38 + 36 + 40 = 114 ⇒  A + B + C = 57 ∴  A = (A + B + C) – (B + C) = 57 – 36 = 21 yr
The selling price of an article is Rs 816 if the discount on it is 15%. What would be the selling price of the article (in Rs) if the discount on it is...
The marked price of a pen and pencil are in the ratio of 5:6. The shopkeeper gives 20% discount on the pen. If the total discount on both the pen and th...
Two successive discounts of 20% and 10% are equal to what single discount percentage?
Sita gets a discount of 20% on a Rs.3,000 juicer mixer machine. Since she pays cash, she gets an additional 5% discount too. How much does she pay?
A chair is sold for Rs810 after giving a discount of 10% on its marked price. The cost price of the chair is Rs720. If it is sold at the marked price, t...
An article is marked 40% above the cost price. If a discount of x% is given on the marked price of the article, then a final profit of 12% is obtained. ...
Sanjay ate in a restaurant and got a membership discount of 40% on the original bill amount but he has to pay 12% as service tax and 6% service charge o...
A shopkeeper offers two successive discounts of 10% and 20% on an article. Find the single equivalent discount.
On an item there is 8% discount on the marked price of Rs.32,000. After giving an additional season's discount, the item is sold for Rs.25,000. How much...
A purchased an article and sold it to B at 12.5% profit. B marked it up by 10% above the price at which A has purchased it and then sold it after giving...
