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Minua uses 30% of her monthly earnings for rent and 50% of the remaining amount for food and transportation. If she spends dollar 525 for food and transportation, calculate how much she pays for rent.

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400 dollars

450 dollars

500 dollars

550 dollars

answer is B.

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Detailed Solution

Let the monthly salary of minua be

.
given that 30 percent of her salary is for rent,
Here, we use the formula:

Thus, money spent on rent:

Total money = Money on rent + Money not on rent.
Rest of money:

Taking LCM we get:

Now, 50% of this money is used for food and transportation, Thus, 50% of

is spent on food and transportation.

Money is spent on food and transportation:

Now given that 525 dollar are spent on food and transportation,

Amount spent on rent is:

Minua's monthly salary is: 1500 dollars.
So, we get:

The amount spent for rent is 450 dollars.

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