If the price of 1 dozen pin is reduced by 2 paisa, then 6 more pins will be got in 42 paisa. Calculte the present price of 1 dozen pin.

If the price of 1 dozen pen is reduced by ₨. 6, then 3 more pens will be got in ₨. 30. Calculate the price of 1 dozen pen before the reduction of price.

If the price of pins decreases 2 paise per dozen, then the buyer will get 6 pins more than the number of pins he should normally get for 42 paise. What is the price per dozen of pins at present ?

Presently, the price of a dozen of bananas has increased by 6 rupees. If the previous price of a dozen of bananas was x rupees, find the cost of 2x dozen of bananas.

The costof 3 umbrellas or 1 chair is 600 rupees. Calculate the price of 2 umbrellas and 2 chairs.

A piece of diamond is broken into three pieces, the weights of the pieces being in the ratio 1: 2:3 . Price of a piece of diamond is proportional to the square of its weight . Find the price of the original piece , if the loss due to breakage is rs 22000 .

An investment consultant predicts that the odds against the price of a certain stock will go up during the next week are 2 : 1 and the odds in favour of the price remaining the same are 1 : 3 what is the probability that the price of the stock will go down during the next week?

A certain amount of gas is expanded from a volume of 20 mL to 42.6 mL by the following three processes (i) against zero pressure (ii) against constant external pressure of 1.2 atm (iii) against constant external pressure of 2.0 atm. Calculate the work done in each of the above three processes.