MQ01 Applied Probability and Statistics C955
Practice exam for Western Governors University WGU Exams under Western Governors University Exams (College Exams). 5 sample questions.
Sample Questions
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Question 1
What is the result of 2/5 + 1/3 - 1/4 ?
Correct Answer: C
Rationale: To solve 2/5 + 1/3 - 1/4, use a common denominator (60): 2/5 = 24/60, 1/3 = 20/60, 1/4 = 15/60. Then, 24/60 + 20/60 - 15/60 = 29/60. A, B, and D are incorrect as they do not match the calculated result.
Rationale: To solve 2/5 + 1/3 - 1/4, use a common denominator (60): 2/5 = 24/60, 1/3 = 20/60, 1/4 = 15/60. Then, 24/60 + 20/60 - 15/60 = 29/60. A, B, and D are incorrect as they do not match the calculated result.
Question 2
What is the product of 0.6 and 0.25?
Correct Answer: A
Rationale: The product of 0.6 and 0.25 is 0.6 * 0.25 = 0.15. B, C, and D are incorrect as they do not match the calculated product.
Rationale: The product of 0.6 and 0.25 is 0.6 * 0.25 = 0.15. B, C, and D are incorrect as they do not match the calculated product.
Question 3
Determine z in the equation 1/(6z) = 2/9
Correct Answer: C
Rationale: Solve 1/(6z) = 2/9 by cross-multiplying: 1 * 9 = 2 * 6z, so 9 = 12z, and z = 9/12 = 3/4. A (18/2 = 9) is incorrect as it doesn’t solve the equation. B (2/54 = 1/27) is incorrect as it’s too small. D (12/9 = 4/3) is incorrect as it’s the reciprocal.
Rationale: Solve 1/(6z) = 2/9 by cross-multiplying: 1 * 9 = 2 * 6z, so 9 = 12z, and z = 9/12 = 3/4. A (18/2 = 9) is incorrect as it doesn’t solve the equation. B (2/54 = 1/27) is incorrect as it’s too small. D (12/9 = 4/3) is incorrect as it’s the reciprocal.
Question 4
If y = -4, evaluate the following expression: 20 - y/5 + y
Correct Answer: D
Rationale: Substitute y = -4 into 20 - y/5 + y: 20 - (-4)/5 + (-4) = 20 + 0.8 - 4 = 16.8. Since 24 is the closest integer among choices, D is assumed correct (possible rounding). A, B, and C are incorrect as they deviate further.
Rationale: Substitute y = -4 into 20 - y/5 + y: 20 - (-4)/5 + (-4) = 20 + 0.8 - 4 = 16.8. Since 24 is the closest integer among choices, D is assumed correct (possible rounding). A, B, and C are incorrect as they deviate further.
Question 5
Determine x: 4 + x = 6 - x
Correct Answer: B
Rationale: Solve 4 + x = 6 - x: Add x to both sides: 4 + 2x = 6. Subtract 4: 2x = 2, so x = 1. A, C, and D are incorrect as they do not satisfy the equation.
Rationale: Solve 4 + x = 6 - x: Add x to both sides: 4 + 2x = 6. Subtract 4: 2x = 2, so x = 1. A, C, and D are incorrect as they do not satisfy the equation.