The total expenses of a hostel are partly constant and partly vary directly as the number of boarders. When the number of boarders are 120 and 100 the total expenses are ₨.2,000 and ₨.1,700 respectively. What will be the number of boarders when the total expenses is ₨. 1.880?

The weekly expenses of a hostel are partly constant and partly vary directly as the number of inmates . If the expenses are rs 2000 when the number of inmates is 120 and rs 1700 when the number is 100 . Find the number of inmates when the expenses are rs 1880 .

A, B and C have oxidation number of +6, -2 and -1 respectively. What will be the possible molecular formula when these atoms combine together ?

To dig a well of x dcm deep , one part of the total expenses varies directly with x and other part varies directly with x^2 . If the expenses of digging wells of 100 dcm and 200 dcm depths are rs5000 and rs12000 respectively , calculate the expenses of digging a well of 250 dcm depth.

The total number of terms in the expansion of (1+2x+x^2)^2 is

Total number of terms in the expansion of (1-x-x^(2))^(5) is -

The total number of binary operations on the set S={1,2} having 1 as the identity element is n . Find n .

To dig a well of x dcm deep, one part of the total expenses varies directly with x and other part varies directly with x^2 . If the expenses of digging well of 100 dcm depths are Rs 5000 and Rs 12000 respectively. Calculate the expenses of digging a well of 250 dcm depth.

If x, y in [0,2pi] then find the total number of order pair (x,y) satisfying the equation sinx .cos y = 1

A gaseous mixture contains three gases A, B and C with a total number of moles of 10 and total pressure of 10 atm. The partial pressures of A and B are 3 atm and 1 atm respectively and if C has molecular weight of 2. Then, the weight of C present in the mixture will be

Numbers greater than 1000 but less than 4000 are formed using the digits 0,1,2,3,4 (repetition allowed). Total number of such numbers is-