Bayes' Theorem: P(A | B) = P(A and B) / P(B)
P(Friday and absent) = 0.03
P(Friday) = 0.2
Probability that a student is absent given that its Friday, P(absent | Friday) = P(absent and Friday)/P(Friday)
= 0.03/0.2
= 0.15
the probability that it is Friday is 0.2. What is the probability that a student is...
(1 point) A not-so-enthusiastic student has a predictable pattern for attending class. If the student attends class on a certain Friday, then she is 3 times as likely to be absent the next Friday as to attend. If the student is absent on a certain Friday, then she is 2 times as likely to attend class the next Friday as to be absent again. What is the long run probability the student either attends class or does not attend class?
Assuming today is Friday, what day of the week will it be in 91 days from today? Sunday O Monday Tuesday Wednesday ? Thursday O Friday O Saturday
postman makes a delivery every weekday (Monday to Friday) around 10 AM. The probability for the postman to be late for delivery in a certain day is 0.4. 1. What is the probability that the postman will be late on no more than 2 days during the working week (Monday to Friday)? 2. What is the probability that the postman is late for the first time on the 5th day? 3. How long until the postman is expected to be...
A postman makes a delivery every weekday (Monday to Friday) around 10 AM. The probability for the postman to be late for delivery in a certain day is 0.4. 1. What is the probability that the postman will be late on no more than 2 days during the working week (Monday to Friday)? 2. What is the probability that the postman is late for the first time on the 5th day? 3. How long until the postman is expected to...
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48. Find the probability that a randomly selected student is male, given that the student's preference was Harry Potter.: * Oa. 0.3600 Ob. 0.2941 Oc. 0.6400 Od. 0.8170 Questions 49-50: If we pick a year at random and count how many Friday 13th's are in the year, it turns out there will be 1, 2, or 3 such days. (In other words, every year has to have at least one Friday 13th but no more than three. It can be...
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