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Question

Last year, if Arturo spent a total of 12,000onhismortgagepayments,realestatetaxes,andhomeinsurance,howmuchdidhespendonhisrealestatetaxes?(1)Lastyear,thetotalamountthatArturospentonhisrealestatetaxesandhomeinsurancewas33\frac{1}{3}$ percent of the amount that he spent on his mortgage payments.
(2) Last year, the amount that Arturo spent on his real estate taxes was 20 percent of the total amount he spent on his mortgage payments and home insurance.

A
Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
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B
Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
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C
Both statements together are sufficient, but neither statement alone is sufficient.
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D
Each statement alone is sufficient.
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E
Statements (1) and (2) together are not sufficient.
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Solution

The correct option is B Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
Let M, R, and H be the amounts that Arturo spent last year on mortgage payments, real estate taxes, and home insurance, respectively. Given that, M + R + H = 12000, determine the value of R.
  1. Given that and M + R + H = 12000, then M = 9000. However, the value of R cannot be determined, since it is possible that R = 2000 (when M = 9000 and H = 1000) and it is possible that R = 1000 (when M = 9000 and H = 2000). Thus, not sufficient.
  2. Given that , or 5R = M + H and M + R + H = 12000 which can be rewritten as (M + H) + R = 12000 , then 5R + R = 12000, or R = 2000; SUFFICIENT.
  • The correct answer is B; statement 2 alone is sufficient

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