MBA Exam undefined

the expenses of a hostel are partly fixed and partly varying directly with the no. of occupants.if no. of occupants are 60,each of the occupants has to bear rupees 1200 per month and if there are 30 more occupants,then the share of each of the occupants comes down by rupees 200 per occupant.how many occupants should be there if the share of each occupant is rupees 900.pl. provide sol.

1) 120
2) 150
3) 180
4) 200

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MBA Other Question

Consider the positive integers that such that its digits are either 1,2 or 3. Define a function f such that f(N) = the number of positive integers consisting of only 1, 2 , and 3 whose digits sum to N. find f(10)

1) 81
2) 149
3) 274
4) 365
5) 553
How many pairs of positive integers a, b have b < a < 1000 and their arithmetic mean equal to their geometric mean plus 2?

1) 2
2) 3
3) 29
4) None of these