Some expenses in a hostel is fixed and some are variable with number of students. If there are 20 students then total cost is 30000/- and, if there are 50 students then the total cost is 60000/- then what will be the cost of 65 students?
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20 students cost 30000
1 student cost 1500
15 student cost 22500
65 students cost 60000+22500=82500
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