Modded SAT Question Bank
by Abdullah Mallik dedicated to DPT SAT Batches and Someone Special | GitHub
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Test
Math
Domain
Problem-Solving and Data Analysis
Skill
Percentages
Difficulty
Medium
ID: 8a714fa1
Modded SAT Question Bank by Abdullah Mallik

Which of the following represents the result of increasing the quantity x by 9%, where x is greater than 0 ?

  1. 1 point 0 9 x

  2. 0 point 0 9 x

  3. x plus 9

  4. x plus 0 point 0 9

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Correct Answer: A
Rationale

Choice A is correct. Increasing the positive quantity x by 9% is the result of adding 9% of x to x. 9% of x can be represented algebraically as the fraction, 9 over 100, end fraction, times x, or 0 point 0 9 x. Adding this expression to x yields x plus 0 point 0 9 x, or 1 point 0 9 x.

Choice B is incorrect. This represents 9% of x. Choice C is incorrect. This represents increasing x by 9, not by 9%. Choice D is incorrect. This represents increasing x by 0.09, not by 9%.

Question Difficulty: Medium
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