Question
The average monthly fee of all 45 students in a class is
Rs. 9,500. After an increment, the new monthly average fee of each student becomes Rs. (9500 + X). If the total fees of all the students after the increase in fees become Rs. 4,50,000, then find the value of (3X + 20% of X).Solution
ATQ,Initial total fees of all 45 students = 45 X 9500 = 4,27,500 New total fees of all 45 students = Rs. 4,50,000 Total increase in fees = 450000 - 427500 = Rs. 22,500 So, X = (22500/45) = 500 So, 3X + 20% of X = 3 X 500 + 0.20 X 500 = 1500 + 100 = 1600
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