Percentage
- The price of rice has increased by 60%. In order to restore to the original price, the new price must be reduced by ?
-
View Hint View Answer Discuss in Forum
Let original price = Rs. 100
⇒ Increase price = Rs. 160
⇒ Decrease on Rs. 160 = Rs. 60
∴ Decrease on Rs. 100 = (60/160) x 100 %Correct Option: B
Let original price = Rs. 100
⇒ Increase price = Rs. 160
⇒ Decrease on Rs. 160 = Rs. 60
∴ Decrease on Rs. 100 = (60/160) x 100 % = 371/2%
- One litre of water is evaporated from 6 litre of a solution containing 5% salt. The percentage of salt ?
-
View Hint View Answer Discuss in Forum
Salt in 6 liter = 5% of 6 = 0.30 liter
Salt in new solution = (0.30/5) x 100% = 6%Correct Option: D
Salt in 6 liter = 5% of 6 = 0.30 liter
Salt in new solution = (0.30/5) x 100% = 6%
- √(3.6% of 40) is equal to ?
-
View Hint View Answer Discuss in Forum
√(3.6/100) x 40
= √1.44 = 1.2Correct Option: C
√(3.6/100) x 40
= √1.44 = 1.2
- A student is required to secure at least 50% marks in order to pass an examination. He secured 50 marks which were less than the minimum passing marks by 50. The maximum marks of the paper are ?
-
View Hint View Answer Discuss in Forum
Minimum passing marks = 50 + 50 = 100
Let the total marks = x
Then, 50% of x = 100Correct Option: A
Minimum passing marks = 50 + 50 = 100
Let the total marks = x
Then, 50% of x = 100
⇒ x = (100/50) x 100 = 200
- Two numbers X and Y are respectively 30% and 35% less than a third number Z . By what percentage is the number Y less than that of the number X ?
-
View Hint View Answer Discuss in Forum
Let Z = 100, X = 100 - 30 = 70
Y = 100 - 35 = 65
∴ Y is less by X = (70 - 65)/70 x 100%Correct Option: C
Let Z = 100, X = 100 - 30 = 70
Y = 100 - 35 = 65
∴ Y is less by X = (70 - 65)/70 x 100%
= 5/70 x 100% = 71/7 %
