For the following questions answer them individually
The marked price of an article is Rs 960 and it is sold at a discount of Rs 192. What is the discount percentage?
If $$\frac{x}{y} = \frac{2}{3}$$, then what is the ratio of $$(3x + 2y)$$ and $$(3x - y)$$ ?
The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number?
If the rice is sold at Rs 56 per kg, there would be a 40% loss. To earn a profit of 20% what should be the price of rice (per kg)?
If the profit is 20%, then what will be the ratio of cost price to selling price respectively?
In a school 60% of the students are girls. If number of boys is 480, then what is the total number of students in the school?
Speeds of a boat along the current and against the current are 14 km/hr and 7 km/hr respectively. What is the speed of boat (in km/hr) in still water?
A person goes from point N to P and comes back. His average speed for the whole journey is 60 km/hr. If his speed while going from N to P is 40 km/hr, then what will be the speed of the person (in km/hr) while coming back from P to N?
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