WGU C784 Applied Healthcare Statistics Pre-Assessment
Exam Actual Exam 2026/2027 | Complete Exam-Style
Questions with Detailed Rationales | Pass Guaranteed –
A+ Graded
Section 1: Basic Numeracy & Calculation Skills
Q1: A pharmacist calculates a compound medication using the expression 5 × (30 −
27)² + 4. What is the correct result in milligrams?
A. 29
B. 225
C. 49 [CORRECT]
D. 145
Correct Answer: C
Rationale: Correct because applying PEMDAS yields parentheses first (30 − 27 = 3), then
exponent (3² = 9), then multiplication (5 × 9 = 45), then addition (45 + 4 = 49).
Q2: An IV infusion calculation requires evaluating 12 ÷ 3 + 4 × (6 − 2)² − 5. What is the
correct value?
A. 35
B. 63 [CORRECT]
C. 147
D. 23
Correct Answer: B
Rationale: Correct because the calculation yields parentheses (6 − 2 = 4), exponent (4² =
16), division (12 ÷ 3 = 4), multiplication (4 × 16 = 64), and finally addition/subtraction left
to right (4 + 64 − 5 = 63).
Q3: A laboratory freezer was at −12°C and the temperature rose by 15°C during a
defrost cycle. What is the new temperature?
A. 27°C
,B. 3°C [CORRECT]
C. −27°C
D. −3°C
Correct Answer: B
Rationale: Correct because the calculation is −12 + 15 = 3, representing a 15-degree
increase from a negative starting temperature.
Q4: A bacterial culture starts with 150 organisms and doubles every 30 minutes. How
many organisms are present after 2 hours?
A. 600
B. 1,200
C. 2,400 [CORRECT]
D. 300
Correct Answer: C
Rationale: Correct because 2 hours contains four 30-minute doubling periods, so the
calculation is 150 × 2⁴ = 150 × 16 = 2,400 organisms.
Q5: The variance of patient wait times is 121 minutes². What is the standard deviation?
A. 11 minutes [CORRECT]
B. 60.5 minutes
C. 121 minutes
D. 14,641 minutes
Correct Answer: A
Rationale: Correct because the standard deviation is the square root of the variance,
and √121 = 11 minutes.
Q6: A hospital needs to package 56 and 84 units of medication into identical largest
possible bins. What is the greatest common factor using prime factorization?
A. 14
B. 28 [CORRECT]
C. 7
D. 12
Correct Answer: B
Rationale: Correct because 56 = 2³ × 7 and 84 = 2² × 3 × 7, so the GCF is 2² × 7 = 28.
Q7: A lab result for creatinine is reported as 4.738 mg/dL. What is this value rounded to
the nearest hundredth?
, A. 4.73 mg/dL
B. 4.74 mg/dL [CORRECT]
C. 4.8 mg/dL
D. 4.7 mg/dL
Correct Answer: B
Rationale: Correct because the digit in the thousandths place is 8, which rounds the
hundredths digit 3 up to 4, yielding 4.74.
Q8: A pediatric dose of 2.75 mL must be measured to the nearest tenth of a milliliter.
What is the correct rounded dose?
A. 2.7 mL
B. 3.0 mL
C. 2.8 mL [CORRECT]
D. 2.75 mL
Correct Answer: C
Rationale: Correct because the hundredths digit 5 rounds the tenths digit 7 up to 8,
giving 2.8 mL for precise pediatric administration.
Q9: A pharmacy inventory starts with 350 units, receives 180, dispenses 95, receives 40
more, and dispenses 75. How many units remain?
A. 400 [CORRECT]
B. 325
C. 480
D. 390
Correct Answer: A
Rationale: Correct because the calculation 350 + 180 − 95 + 40 − 75 = 400 units
remaining in inventory.
Q10: An IV bag contains 750 mL and must infuse evenly over 5 hours. What is the
infusion rate in mL per hour?
A. 125 mL/hour
B. 150 mL/hour [CORRECT]
C. 175 mL/hour
D. 100 mL/hour
Correct Answer: B
Rationale: Correct because dividing total volume by total time yields 750 ÷ 5 = 150
mL/hour.
Exam Actual Exam 2026/2027 | Complete Exam-Style
Questions with Detailed Rationales | Pass Guaranteed –
A+ Graded
Section 1: Basic Numeracy & Calculation Skills
Q1: A pharmacist calculates a compound medication using the expression 5 × (30 −
27)² + 4. What is the correct result in milligrams?
A. 29
B. 225
C. 49 [CORRECT]
D. 145
Correct Answer: C
Rationale: Correct because applying PEMDAS yields parentheses first (30 − 27 = 3), then
exponent (3² = 9), then multiplication (5 × 9 = 45), then addition (45 + 4 = 49).
Q2: An IV infusion calculation requires evaluating 12 ÷ 3 + 4 × (6 − 2)² − 5. What is the
correct value?
A. 35
B. 63 [CORRECT]
C. 147
D. 23
Correct Answer: B
Rationale: Correct because the calculation yields parentheses (6 − 2 = 4), exponent (4² =
16), division (12 ÷ 3 = 4), multiplication (4 × 16 = 64), and finally addition/subtraction left
to right (4 + 64 − 5 = 63).
Q3: A laboratory freezer was at −12°C and the temperature rose by 15°C during a
defrost cycle. What is the new temperature?
A. 27°C
,B. 3°C [CORRECT]
C. −27°C
D. −3°C
Correct Answer: B
Rationale: Correct because the calculation is −12 + 15 = 3, representing a 15-degree
increase from a negative starting temperature.
Q4: A bacterial culture starts with 150 organisms and doubles every 30 minutes. How
many organisms are present after 2 hours?
A. 600
B. 1,200
C. 2,400 [CORRECT]
D. 300
Correct Answer: C
Rationale: Correct because 2 hours contains four 30-minute doubling periods, so the
calculation is 150 × 2⁴ = 150 × 16 = 2,400 organisms.
Q5: The variance of patient wait times is 121 minutes². What is the standard deviation?
A. 11 minutes [CORRECT]
B. 60.5 minutes
C. 121 minutes
D. 14,641 minutes
Correct Answer: A
Rationale: Correct because the standard deviation is the square root of the variance,
and √121 = 11 minutes.
Q6: A hospital needs to package 56 and 84 units of medication into identical largest
possible bins. What is the greatest common factor using prime factorization?
A. 14
B. 28 [CORRECT]
C. 7
D. 12
Correct Answer: B
Rationale: Correct because 56 = 2³ × 7 and 84 = 2² × 3 × 7, so the GCF is 2² × 7 = 28.
Q7: A lab result for creatinine is reported as 4.738 mg/dL. What is this value rounded to
the nearest hundredth?
, A. 4.73 mg/dL
B. 4.74 mg/dL [CORRECT]
C. 4.8 mg/dL
D. 4.7 mg/dL
Correct Answer: B
Rationale: Correct because the digit in the thousandths place is 8, which rounds the
hundredths digit 3 up to 4, yielding 4.74.
Q8: A pediatric dose of 2.75 mL must be measured to the nearest tenth of a milliliter.
What is the correct rounded dose?
A. 2.7 mL
B. 3.0 mL
C. 2.8 mL [CORRECT]
D. 2.75 mL
Correct Answer: C
Rationale: Correct because the hundredths digit 5 rounds the tenths digit 7 up to 8,
giving 2.8 mL for precise pediatric administration.
Q9: A pharmacy inventory starts with 350 units, receives 180, dispenses 95, receives 40
more, and dispenses 75. How many units remain?
A. 400 [CORRECT]
B. 325
C. 480
D. 390
Correct Answer: A
Rationale: Correct because the calculation 350 + 180 − 95 + 40 − 75 = 400 units
remaining in inventory.
Q10: An IV bag contains 750 mL and must infuse evenly over 5 hours. What is the
infusion rate in mL per hour?
A. 125 mL/hour
B. 150 mL/hour [CORRECT]
C. 175 mL/hour
D. 100 mL/hour
Correct Answer: B
Rationale: Correct because dividing total volume by total time yields 750 ÷ 5 = 150
mL/hour.
