Question
The average age of a class of 18 girls is 14 years. If 2
new girls having average age of 10 years join the class, then the average age of the class becomes:Solution
Total age of 18 girls = 18 × 14 = 252 years Total age of 20 girls = 252 + (2 × 10) = 272 years Therefore new average age = 272/20 = 13.6 years
Income of A is 65% of the Income of B and A together. The saving of B is 44% of his Income and equals to Rs. 15400. Find the difference between the inco...
A person spent 12.5% of his monthly income on food and 32% of the remaining on rent. If amount spent on rent is Rs 1512, then find the amount spe...
Vegetables lose water when cooked. Raw vegetables contain 90% water, but after cooking they contain only 50% water. How much raw vegetable is needed to ...
A spent 30% and 20% of his monthly salary on food and rent, respectively. Of the remaining amount, he gave 20% and 30% to his mother and brother, respec...
Fresh grapes contain 80% water while dry grapes contain 20% water. How many kilograms of fresh grapes are needed to make 500 grams of dry grapes?
The population of a city is decreased by 12% in the first year and then increased by 25% in the second year. Find the population of the city at the end...
A person spent 20% of his monthly income on food and 65% of the remaining on rent. If amount spent on rent is Rs 1047.80, then find the amount spent on ...
If x% of y is 100 and y% of z is 200, then find the relation between x and z.
...A businessman's earning increase by 25%in one year but decreases by 4%in the next. Going by this pattern, after 5 years, his total earnings would be Rs....
Out of her total income, Priya spent 20% on rent, 50% of the remaining income on groceries, and saved 40% of the income left after her expenses.
Relevant for Exams:
