C233 WGU Exam (Statistics) – Answered Questions & Solutions

Sample Space

Question: A spinner is divided into four equal sections labeled A, B, C, and D. What is the sample space?

Correct Answer: {A, B, C, D}

Probability – Cards

Question: What is the probability of drawing a heart from a standard deck of 52 cards?

Correct Answer: 1/4

Probability – Coin & Spinner

Question: A coin is tossed and a spinner with 8 equal spaces (1–8) is spun. What is the probability of getting heads and a number less than 3?

Correct Answer: 1/8

Probability – Survey (Coffee & Tea)

Question: In a group of 100 people, 60 prefer coffee, 40 prefer tea, and 25 prefer both. What is the probability a person likes either coffee or tea?

Correct Answer: 0.75

Probability – Marbles (With Replacement)

Question: There are 10 green, 20 yellow, and 15 purple marbles. What is the probability of selecting 2 green marbles then 1 yellow marble (with replacement)?

Correct Answer: 16/729

Probability – Balls (With Replacement)

Question: There are 14 black, 16 white, and 10 red balls. What is the probability of selecting black, then red, then white (with replacement)?

Correct Answer: 7/200

Probability – Genres

Question: If Action = 30% and Comedy = 35%, what is the probability of selecting Action then Comedy (with replacement)?

Correct Answer: 10.5%

Probability – Colored Balls

Question: A bag contains red, blue, and green balls. If P(red)=0.3 and P(blue)=0.6, what is P(green)?

Correct Answer: 0.1

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