1.

Justin spends 30% of his total salary on food items, 20% of the remaining on house rent, 10% of the remaining on internet and saves 50% of the remaining salary. If his monthly salary is Rs. 42000, how much money does he save every month?1). 106872). 104443). 105844). None of these

Answer»

100% of his total salary = RS. 42000

⇒ Remaining percentage of his salary after SPENDING 30% of his salary on FOOD ITEMS = (100% - 30%) of his salary = 70%

⇒ Remaining percentage of his salary after spending 20% of his remaining salary on house rent = $(\left( {\frac{{100 - 20}}{{100}} \times 70} \right))$of his salary = 56%

⇒ Remaining percentage of his salary after spending 10% of his remaining salary on internet = $(\left( {\frac{{100 - 90}}{{100}} \times 56} \right))$of his salary = 50.4%

⇒ Percentage of salary saved = $(\left( {\frac{{100 - 50}}{{100}} \times 50.4} \right))$ of his salary = 25.2%

∴ Salary saved = $(\frac{{25.2}}{{100}} \times 42000)$ = Rs. 10584


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