Averages, Percentages, Profit Loss and Interest

Nbangalorekar bought a 10 kg of water-melon in Bangalore that had 99% water. After the water-melon was left outdoors for a day, it was 95% water. What was the weight of the dehydrated water-melon? *(1) 9.6 kg (2) 9.5 kg (3) 2 kg (4) can…

Nokia maufactures mobile handsets and marks a price which is 8 times the manufacturing price, and prints it on the handset. They sell it to a distributor at a certain
discount. The distributor then sells it to the wholesaler and offers him a discount equal to 3/4th of the discount that he received from the manufacturer. The wholesaler then sells it to the retailer at a discount equal to 2/3rd of the discount he received from the distributor. The retailer finally sells it to the customer at a discount equal to 1/2 the discount that he received from the wholesaler. If all the discounts are given on the price printed on the box and if the wholesaler made a profit of 50%, then who made the least profit?

Nokia maufactures mobile handsets and marks a price which is 8 times the manufacturing price, and prints it on the handset. They sell it to a distributor at a certain
discount. The distributor then sells it to the wholesaler and offers him a discount equal to 3/4th of the discount that he received from the manufacturer. The wholesaler then sells it to the retailer at a discount equal to 2/3rd of the discount he received from the distributor. The retailer finally sells it to the customer at a discount equal to 1/2 the discount that he received from the wholesaler. If all the discounts are given on the price printed on the box and if the wholesaler made a profit of 50%, then who made the least profit?

Answer the questions on the basis of the information given below.

There are three liquids X, Y and Z. Cost price of 100 ml of liquid X
and selling price of 100 ml of liquid Y are the same, which is Rs. 500.
Liquid X, when sold, yields a loss of 10% and Liquid Y, when sold,
yields a profit of 10%. Z's cost price and selling price are the same,
which is Rs. 500 for 100 ml.



Three types of products (P1, P2 and P3) are prepared in the following manner :

1. P1 contains X and Y in the ratio 3 : 2 by volume

2. P2 contains X and Y in the ratio 2 : 3 by volume

3. P3 contains only Z

The selling price of each of the products is the aggregate sum of the selling price of the individual components.

If 341 ml of P1 was sold, then the profit/loss (approximately) would be
(1) 1% loss (2) 2.5% loss (3) 1% profit
(4) 2.5% profit (5) 5% profit

Answer the questions on the basis of the information given below.
There are three liquids X, Y and Z. Cost price of 100 ml of liquid X and selling price of 100 ml of liquid Y are the same, which is Rs. 500. Liquid X, when sold, yields a loss of 10% and Liquid Y, when sold, yields a profit of 10%. Z's cost price and selling price are the same, which is Rs. 500 for 100 ml.

Three types of products (P1, P2 and P3) are prepared in the following manner :
1. P1 contains X and Y in the ratio 3 : 2 by volume
2. P2 contains X and Y in the ratio 2 : 3 by volume
3. P3 contains only Z

The selling price of each of the products is the aggregate sum of the selling price of the individual components.If 341 ml of P1 was sold, then the profit/loss (approximately) would be

An examination consisted of 5 tests out of which 3 were Theory and 2 were Practical. Marks obtained by Ravi in the 5 tests were 20, 40, 60, 80 and 100. The average marks for Theory and Practical were the same. While calculating the 'overall weighted average' for the examination, the test with the maximum score among the Theory tests and the test with the minimum score among the Practical tests were given twice the weight as compared to others. The maximum 'overall weighted average' would be closest to

Boxes of 2 types viz. A and B are used for packing balls of 2 different colours. Each of the type A boxes can hold a maximum of 17 blue balls or 19 green balls, and each of the type B boxes can hold a maximum of 18 blue balls or 23 green balls. When all the boxes of type A are to be completely filled with blue balls and all the boxes of type B with green balls, the total number of balls required is 566. But when the boxes of type A are to be completely filled with green balls and the boxes of type B with blue balls, the total number of balls required is 49 less. How many boxes are there? (All balls of the same colour are identical.)

Boxes of 2 types viz. A and B are used for packing balls of 2 different colours. Each of the type A boxes can hold a maximum of 17 blue balls or 19 green balls, and each of the type B boxes can hold a maximum of 18 blue balls or 23 green balls. When all the boxes of type A are to be completely filled with blue balls and all the boxes of type B with green balls, the total number of balls required is 566. But when the boxes of type A are to be completely filled with green balls and the boxes of type B with blue balls, the total number of balls required is 49 less. How many boxes are there? (All balls of the same colour are identical.)

Gattu had 130 lts of blue paint,160 lts of red paint, and 180 lts of white paint. He painted four equally sized stripes on a wall, making a blue stripe, a red stripe, a white stripe and a pink stripe. Pink paint is a mixture of red and white paints. When Gattu finished, he had equal amount of blue, red, and white paints left. If he has to paint four more stripes of the same dimensions on another wall in exactly the same way, then which of the following is true?
(1) Gattu requires 30 lts of blue paint, 0 lts of red paint and 40 lts of white paint
(2) Gattu requires 30 lts of blue paint, 60 lts of red paint and 60 lts of white paint
(3) Gattu requires 30 lts of blue paint, 60 lts of red paint and 80 lts of white paint
(4) Gattu requires 80 lts of blue paint, 110 lts of red paint and 130 lts of white paint

In a test of 50 questions, for every correct answer one gets 1 mark and for every wrong answer one incurs a penalty of 1/n marks, where n is a positive integer. No marks are awarded for unattempted questions. If 336 distinct scores are possible in this test, then, 'n' satisfies

In a test of 50 questions, for every correct answer one gets 1 mark and for every wrong answer one incurs a penalty of 1/n marks, where n is a positive integer. No marks are awarded for unattempted questions. If 336 distinct scores are possible in this test, then, 'n' satisfies

A Shopkeeper can buy 'X' number of pencils and 'Y' number of pens in Rs. 1000. Cost price of a pencil is Rs. 30 and that of a pen is Rs. 20. He gifts away a few pens and sells the remaining pens at Rs. 25 each and pencils at Rs. 35 each. If he does not make any profit or loss in this transaction, then which of the following relations can be correct?
I. X + Y = 25
II. X + Y = 34
III. X + Y = 45

A Shopkeeper can buy 'X' number of pencils and 'Y' number of pens in Rs. 1000. Cost price of a pencil is Rs. 30 and that of a pen is Rs. 20. He gifts away a few pens and sells the remaining pens at Rs. 25 each and pencils at Rs. 35 each. If he does not make any profit or loss in this transaction, then which of the following relations can be correct?
I. X + Y = 25
II. X + Y = 34
III. X + Y = 45

Raman took classes for 20 consecutive days. On nth day, there were (n + 1) students present in his class, where n is a natural number. Each day Raman distributed Rs.1100 equally among the students present in the class. Student 'x', who attended all the 20 classes of Raman, donated 1/(m + 1) th part of the
amount received by him (from Raman on that particular day) to a charity at the end of each day, where 'm' is the number of students attending the class on that day. What is the total amount donated by student 'x' to the charity?

A man bought two cows for Rs. 1,040. He sold one at a loss of 15% and other at a profit of 36% and then he found that each cow was sold at the same price. Further he bought one more cow with the money received after selling these two cows by paying 10% commission. If he again sells the new cow at 20% profit on the actual cost of cow excluding the commission, then how much money he will receive?

Sony World find that it can sell x DVD per week at Rs. p each where,




Rajesh bought three different varieties of biscuits namely “Krak-jac”, “50-50”, and “Goodday”. The number of biscuits of each variety purchased by him is equal to the price of one biscuit of the particular variety. The price of one biscuit of each of these three varieties is a distinct integer. The aggregate amount spent by him on these biscuit is less than Rs. 100. The price of one biscuit of “Krak-jac” is greater then he price of one biscuit of “50 – 50”. The price of one biscuit of a particular variety is greater than the price of one biscuit of another variety by Rs. 5. If Rajesh paid an average of Rs. 7 for each biscuit bought by him. Then find the price of one biscuit of “Krakjac”.

Rahul pays Rs. 3 and gets to throw a dice and receives an amount equal to the number that the top face of the die shows. If Rahul keeps on playing the game, how much does he win per throw in the long run?


Rahul pays Rs. 3 and gets to throw a dice and receives an amount equal to the number that the top face of the die shows. If Rahul keeps on playing the game, how much does he win per throw in the long run?


Ram and Shyam sell their watches at Rs.6000. Ram calculates margin while Shyam calculate his profit on a normal basis. What is the difference in their actual profit if both of them claim to have a profit of 20%?