,WGU C955 OA Exam | Applied Probability and Statistics (2026) Q&A
| WGU
1. A coin is flipped 4 times. How many different outcomes are possible?
A) 8
B) 16
C) 32
D) 64
Correct Answer: 16
Rationale: Each flip has 2 possible outcomes (heads or tails). For 4 flips, the total number of
outcomes is 2^4 = 16. This is a fundamental application of the multiplication principle in
counting.
2. Which of the following sets of data is discrete?
A) Speed of a car
B) Weight of a dog
C) Adults in a household
D) Time to go to bed
Correct Answer: Adults in a household
Rationale: Discrete data has distinct, countable values. The number of adults in a household
is a whole number that can be counted, making it discrete. Speed, weight, and time are
continuous because they can take on any value within a range.
3. Select the true statement from the following:
A) 0.15 is between 0.138 and 0.149
B) 0.22 is between 0.23 and 0.24
C) 0.34 is between 0.335 and 0.35
,D) 0.46 is between 0.465 and 0.46
Correct Answer: 0.34 is between 0.335 and 0.35
Rationale: Comparing decimals requires examining place values. 0.34 is greater than 0.335
and less than 0.35, so it falls between them. The other statements are false based on
decimal comparison.
4. The number 4.444... (repeating) is best classified as which type of number?
A) An integer
B) Only a real number
C) A rational number
D) A whole number
Correct Answer: A rational number
Rationale: A repeating decimal can be expressed as a fraction (e.g., 4.444... = 40/9), which is
the definition of a rational number. While it is also a real number, "rational number" is the
most specific and accurate classification.
5. Evaluate the following expression: 14 - 21 + (-3)
A) 10
B) 4
C) -4
D) -10
Correct Answer: -10
Rationale: Following the order of operations, perform addition and subtraction from left to
right: 14 - 21 = -7, then -7 + (-3) = -10.
6. Evaluate the following expression: 36 / (-3)
, A) -13
B) -12
C) 12
D) 13
Correct Answer: -12
Rationale: Dividing a positive number by a negative number yields a negative result. 36
divided by 3 is 12, so 36 / (-3) = -12.
7. Which number is a prime number?
A) 21
B) 22
C) 23
D) 24
Correct Answer: 23
Rationale: A prime number has exactly two distinct factors: 1 and itself. 23 is only divisible
by 1 and 23. 21 is divisible by 3 and 7, 22 by 2 and 11, and 24 by many numbers.
8. Evaluate the following expression using order of operations: 4^2 - 8 + 10
A) 10
B) 18
C) 26
D) 34
Correct Answer: 18
Rationale: Using PEMDAS, first calculate the exponent: 4^2 = 16. Then perform subtraction
and addition from left to right: 16 - 8 = 8, then 8 + 10 = 18.
| WGU
1. A coin is flipped 4 times. How many different outcomes are possible?
A) 8
B) 16
C) 32
D) 64
Correct Answer: 16
Rationale: Each flip has 2 possible outcomes (heads or tails). For 4 flips, the total number of
outcomes is 2^4 = 16. This is a fundamental application of the multiplication principle in
counting.
2. Which of the following sets of data is discrete?
A) Speed of a car
B) Weight of a dog
C) Adults in a household
D) Time to go to bed
Correct Answer: Adults in a household
Rationale: Discrete data has distinct, countable values. The number of adults in a household
is a whole number that can be counted, making it discrete. Speed, weight, and time are
continuous because they can take on any value within a range.
3. Select the true statement from the following:
A) 0.15 is between 0.138 and 0.149
B) 0.22 is between 0.23 and 0.24
C) 0.34 is between 0.335 and 0.35
,D) 0.46 is between 0.465 and 0.46
Correct Answer: 0.34 is between 0.335 and 0.35
Rationale: Comparing decimals requires examining place values. 0.34 is greater than 0.335
and less than 0.35, so it falls between them. The other statements are false based on
decimal comparison.
4. The number 4.444... (repeating) is best classified as which type of number?
A) An integer
B) Only a real number
C) A rational number
D) A whole number
Correct Answer: A rational number
Rationale: A repeating decimal can be expressed as a fraction (e.g., 4.444... = 40/9), which is
the definition of a rational number. While it is also a real number, "rational number" is the
most specific and accurate classification.
5. Evaluate the following expression: 14 - 21 + (-3)
A) 10
B) 4
C) -4
D) -10
Correct Answer: -10
Rationale: Following the order of operations, perform addition and subtraction from left to
right: 14 - 21 = -7, then -7 + (-3) = -10.
6. Evaluate the following expression: 36 / (-3)
, A) -13
B) -12
C) 12
D) 13
Correct Answer: -12
Rationale: Dividing a positive number by a negative number yields a negative result. 36
divided by 3 is 12, so 36 / (-3) = -12.
7. Which number is a prime number?
A) 21
B) 22
C) 23
D) 24
Correct Answer: 23
Rationale: A prime number has exactly two distinct factors: 1 and itself. 23 is only divisible
by 1 and 23. 21 is divisible by 3 and 7, 22 by 2 and 11, and 24 by many numbers.
8. Evaluate the following expression using order of operations: 4^2 - 8 + 10
A) 10
B) 18
C) 26
D) 34
Correct Answer: 18
Rationale: Using PEMDAS, first calculate the exponent: 4^2 = 16. Then perform subtraction
and addition from left to right: 16 - 8 = 8, then 8 + 10 = 18.
