math 15 question

Math Questions

Ken’s monthly take-home pay is w dollars. After he pays for food and rent, he has x dollars left
x w – x

2 Which of the following sets of number is has the greatest standard deviation?
(A) 2, 3, 4
(B) 2.5, 3, 3.5
(C) 1, 1.25, 1.5
(D) –2, 0, 2
(E) 20, 21, 21.5

3. The water level in a tank is lowered by 6 inches, then raised by inches, and then lowered by 4 inches. If the water level was x inches before the changes in level, which of the following represents the water level, in inches, after the changes?

4.. When 9 students took a zoology quiz with a possible score of 0 to 10, inclusive, there average (arithmetic mean) score was 7.5. If a tenth student takes the same quiz, what will be the least possible average score on the quiz for all 10 students?
(A) 6.5
(B) 6.75
(C) 7.0
(D) 7.25
(E) 7.5

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The GRE® General Test measures verbal reasoning, quantitative reasoning, critical thinking, and analytical writing skills that have been acquired over a long period of time and that are not related to any specific field of study.

Verbal Reasoning — The skills measured include the test taker's ability to

analyze and evaluate written material and synthesize information obtained from it
analyze relationships among component parts of sentences
recognize relationships between words and concepts
Quantitative Reasoning — The skills measured include the test taker's ability to

understand basic concepts of arithmetic, algebra, geometry, and data analysis
reason quantitatively
solve problems in a quantitative setting
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articulate complex ideas clearly and effectively
examine claims and accompanying evidence
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