Tuesday, June 3, 2008
Monday, June 2, 2008
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
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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