It’s time to put what you’ve learned to the test, get 8 questions right to pass this week.
1.
Which of the following scenarios could be calculated with Bayes’ theorem?
There are three correct answers.
2.
The probability that it is Friday and that a worker is absent is 0.05. The probability that it is Friday is 0.2, since there are 5 days in a working week. What is the probability that a worker is absent given that today is Friday?
Choose the correct answer.
3.
How are probabilities expressed in numeric terms?
There are two correct answers.
4.
A pack contains 5 blue, 3 red, and 2 black pens. What is the probability of drawing a black pen if 1 pen is drawn at random from the pack?
Choose the correct answer.
5.
What do you need to know to be able to calculate conditional probability?
There are two correct answers.
6.
In a class, 40% of the students study math and science. 60% of the students study math. What is the probability of a student studying science given he/she is already studying math?
Choose the correct answer.
7.
Given that C = 'Cloud in January in Germany' and S = 'Snow' what does P(S|C) mean?
Choose the correct answer.
8.
What does the symbol '|' mean in P(A | B)?
Choose the correct answer.
9.
A jar contains black and white marbles. Two marbles are chosen without replacement. The probability of selecting a black marble and then a white marble is 0.40, and the probability of selecting a black marble on the first draw is 0.50. What is the probability of selecting a white marble on the second draw, given that the first marble drawn was black?
Choose the correct answer.
10.
A bag contains 6 blue and 3 red balls. What is the probability of randomly selecting a blue ball given that you selected and removed a red ball on your first attempt?