Probability-Combined-and-Conditional-probabilities -v2 by ClassOf1

VIEWS: 40 PAGES: 4

More Info
									              Sub: Statistics                                                                         Topic: Probability

              Question:

              Simple, Combined and Conditional probabilities.

         ClassOf1 provides expert guidance to College, Graduate, and High school students on homework and assignment problems in
                       Math, Sciences, Finance, Marketing, Statistics, Economics, Engineering, and many other subjects.


                   1.    If two events A and B are mutually exclusive, what does the special rule of addition
                         state?
                             a) P (A or B) = P (A) + P (B)
                             b) P (A and B) = P (A) + P (B)
                             c) P (A and/or B) = P (A) + P (B)
                             d) P (A or B) = P (A) - P (B)
                             e) None of the above

              Solution:

              The addition rule states that, P (A or B) = P (A) + P (B) - P (A and B)
              If two events A and B are mutually exclusive, then P (A and B) = 0
              then P (A or B) = P (A) + P (B)

              Correct answer is a) P (A or B) = P (A) + P (B).

                   2.    Which approach to probability is exemplified by the following formula?


                   Probability of an event happening = No. of times event occurred in the past

                                                                       Total number of observations

                        a)   Classical approach
                        b)   Relative frequency appr
								
To top