Question

There are 135 students in hostel.if number of students is increased by 9,the expenses of mess is increased by 36 per day.while average expenditure per head diminishes by rs.1 find original expenditure of mess

Answer 1

if 9suudent increases expenses increases by 36
but average per head expenditure reduces by 1 which means it reduces by 9
now total increases is =36-9=27
now per head increase in expenditure is 27÷9=3