Question
Initially, a person spends 80% of his salary and saves
the remaining 20%. After receiving a 10% salary increase, his savings remain unchanged, and he spends Rs. 2,000 more. Find his initial salary.Solution
ATQ,  Let, the initial salary of the person be Rs. '100x'.  Initial expenditure of the person = 0.80 X 100x = Rs. '80x'  Initial savings of the person = 100x - 80x = Rs. '20x'  New salary of the person = 1.10 X 100x = Rs. '110x'  Savings of the person remains the same.  So, 80x + 2000 = 110x - 20x  Or, 90x - 80x = 2000  Or, 10x = 2000  So, x = 200  So, the initial salary of the person = 100x = 100 X 200 = Rs.20,000
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