# There are 4 answers for a single question on the exam

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Question 9 of 201.0/ 1.0 PointsThere are 4 answers for a single question on the exam and only one answer is correct. If a student guesses the answer for this question, what is the probability that the student selects the correct answer? (keep 2 decimal places) Answer: 0.25
Feedback: 4 possibilities but only 1 correct answer.1/4Part 4 of 6 - Discrete Probability Knowledge Check Practice0.0/ 4.0 Points
Question 10 of 200.0/ 1.0 PointsDoes the following table represent a valid discrete probability distribution?x12345P(X=x)0.16 0.01 0.25 0.11 0.66
Question 11 of 200.0/ 1.0 PointsThe random variable X = the number of vehicles owned. Find the expected number of vehicles owned. Round answer to two decimal places.Number of Courses , x01234
Probability, P(X=x)0.2 0.35 0.25 0.1 0.1Answer: 1.15Answer Key: 1.55Feedback: 0*.2 + 1*.35 + 2*.25 + 3*.1 + 4*.1Question 12 of 200.0/ 1.0 PointsThe random variable X = the number of vehicles owned. Find the P(X > 2).x01234P(X=x)0.1 0.35 0.25 0.2 0.1
Question 13 of 200.0/ 1.0 Points
Does the following table represent a valid discrete probability distribution?x-5-2.502.55P(X=x)0.05 0.25 0.32 0.18 0.2
Answer Key: AFeedback: Yes, because the probabilities add up to 1Part 5 of 6 - Poisson Distribution Knowledge Check Practice0.0/ 5.0 PointsQuestion 14 of 200.0/ 1.0 PointsA bank gets an average of 12 customers per hour. Assume the variable follows a Poisson distribution. Find the probability that there will be 10 or more customers at this bank in one hour. (That is, find P(X≥10) (keep 4 decimal places) Answer:
Question 15 of 200.0/ 1.0 PointsThere are 6.5 accidents, on average, at an intersection. Assume the variable follows a Poisson distribution. Find the probability that there will be 9 or less accidents at this intersection. (That is, find P(X≤9) (keep 4 decimal places) Answer:
A coffee shop serves an average of 72 customers per hour during the morning rush. Find the probability that less than 59 customers arrive in an hour during tomorrow’s morning rush. Round answer to 4 decimal places. Answer:
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