WGU C784 - APPLIED HEALTHCARE
STATISTICS COMPREHENSIVE OBJECTIVE
ASSESSMENT STUDY GUIDE Questions with
Detailed Rationales Latest 2026 Update | Verified
Answers | Grade A+ Preparation
SECTION 1: NUMBER BASICS & OPERATIONS (Questions 1-15)
1. Given the following expression: 4 + 7 × (6 - 3)². What is the answer using
proper order of operations?
A. 25
B. 46
C. 67
D. 99
Answer: C
Rationale: Following order of operations (PEMDAS): (6-3)=3, 3²=9, 7×9=63,
4+63=67.
2. Given the following expression: 5 × (30 - 27) ÷ 4. What is the answer using
proper order of operations?
A. 3.75
B. 4.25
C. 5.00
D. 6.25
Answer: A
Rationale: Following order of operations: (30-27)=3, 5×3=15, 15÷4=3.75.
3. Given the following expression: (12 + 8) × (5 - 3). What is the answer?
A. 20
B. 30
C. 40
D. 50
,Answer: C
Rationale: (12+8)=20, (5-3)=2, 20×2=40.
4. Given the following set of numbers: 3.3, -2.3, -16, 25. What are the square
roots of the whole number?
A. ±2.3
B. ±3.3
C. ±4
D. ±5
Answer: D
Rationale: The square root of 25 is ±5. 25 is the only whole number in the set.
5. What is the result of 8² + 6²?
A. 28
B. 64
C. 100
D. 128
Answer: C
Rationale: 8²=64, 6²=36, 64+36=100.
6. What is the least common multiple (LCM) of 6 and 8?
A. 12
B. 24
C. 48
D. 96
Answer: B
Rationale: Multiples of 6: 6, 12, 18, 24. Multiples of 8: 8, 16, 24. The LCM is 24.
7. Which of the following is an improper fraction?
A. 3/4
B. 5/5
, C. 7/3
D. 1/2
Answer: C
Rationale: An improper fraction has a numerator greater than or equal to the
denominator. 7/3 has numerator 7 greater than denominator 3.
8. What is 3/4 + 5/8?
A. 8/12
B. 11/8
C. 11/12
D. 6/8
Answer: B
Rationale: Convert to common denominator: 3/4=6/8. 6/8+5/8=11/8.
9. What is 2/3 × 9/4?
A. 18/12
B. 3/2
C. 6/4
D. 9/6
Answer: B
Rationale: Multiply numerators: 2×9=18. Multiply denominators: 3×4=12. 18/12
simplifies to 3/2.
10. Which of the following is a composite number?
A. 13
B. 17
C. 21
D. 29
Answer: C
Rationale: A composite number has more factors than 1 and itself. 21 has factors
1, 3, 7, and 21. 13, 17, and 29 are prime.
STATISTICS COMPREHENSIVE OBJECTIVE
ASSESSMENT STUDY GUIDE Questions with
Detailed Rationales Latest 2026 Update | Verified
Answers | Grade A+ Preparation
SECTION 1: NUMBER BASICS & OPERATIONS (Questions 1-15)
1. Given the following expression: 4 + 7 × (6 - 3)². What is the answer using
proper order of operations?
A. 25
B. 46
C. 67
D. 99
Answer: C
Rationale: Following order of operations (PEMDAS): (6-3)=3, 3²=9, 7×9=63,
4+63=67.
2. Given the following expression: 5 × (30 - 27) ÷ 4. What is the answer using
proper order of operations?
A. 3.75
B. 4.25
C. 5.00
D. 6.25
Answer: A
Rationale: Following order of operations: (30-27)=3, 5×3=15, 15÷4=3.75.
3. Given the following expression: (12 + 8) × (5 - 3). What is the answer?
A. 20
B. 30
C. 40
D. 50
,Answer: C
Rationale: (12+8)=20, (5-3)=2, 20×2=40.
4. Given the following set of numbers: 3.3, -2.3, -16, 25. What are the square
roots of the whole number?
A. ±2.3
B. ±3.3
C. ±4
D. ±5
Answer: D
Rationale: The square root of 25 is ±5. 25 is the only whole number in the set.
5. What is the result of 8² + 6²?
A. 28
B. 64
C. 100
D. 128
Answer: C
Rationale: 8²=64, 6²=36, 64+36=100.
6. What is the least common multiple (LCM) of 6 and 8?
A. 12
B. 24
C. 48
D. 96
Answer: B
Rationale: Multiples of 6: 6, 12, 18, 24. Multiples of 8: 8, 16, 24. The LCM is 24.
7. Which of the following is an improper fraction?
A. 3/4
B. 5/5
, C. 7/3
D. 1/2
Answer: C
Rationale: An improper fraction has a numerator greater than or equal to the
denominator. 7/3 has numerator 7 greater than denominator 3.
8. What is 3/4 + 5/8?
A. 8/12
B. 11/8
C. 11/12
D. 6/8
Answer: B
Rationale: Convert to common denominator: 3/4=6/8. 6/8+5/8=11/8.
9. What is 2/3 × 9/4?
A. 18/12
B. 3/2
C. 6/4
D. 9/6
Answer: B
Rationale: Multiply numerators: 2×9=18. Multiply denominators: 3×4=12. 18/12
simplifies to 3/2.
10. Which of the following is a composite number?
A. 13
B. 17
C. 21
D. 29
Answer: C
Rationale: A composite number has more factors than 1 and itself. 21 has factors
1, 3, 7, and 21. 13, 17, and 29 are prime.
