Question

there are 70 students in a hostel . if the number of students increased by 14 the total expenditure increased by 84 and the average expenditure decreased by 2 . Find the total expenditure

Answer 1

Answer:

Final/Later Total Expenditure = 1344

Earlier Expenditure = 1260

Step-by-step explanation:

Assume earlier average expenditure was x

Earlier expenditure = 70x

Later expenditure = 84 * (x-2)

(expenditure average reduced by 2 so x-2 & students increased by 14 so 70+14=84)

increase in expenditure = 84 * (x-2) - 70x = 84

14x -168 = 84

x = 18

Final / Later Expenditure = 84 * ( 18-2) = 1344

Earlier expenditure = 70x = 70 * 18 = 1260