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MellyBigD

Member

Registered: 2018-03-13

Posts: 10

Please help! Probability Statistics

Hi Guys

Please help me with this exercise:

Question 3 [10 Marks]

Guess clothing stores recorded the buying behaviour of their customers over the last decade (2004 to 2014). They established that the probability that a customer will buy a pair of Guess jeans is about 0.7. A customer buys a Guess top 30% of the time given that a pair of Guess jeans was purchased, but only 15% of the time given that a pair of Guess jeans was not purchased.

3.1) Explain the concepts of:
3.1.1) Probability Addition Law                                    (2)

3.1.2) Probability Multiplication Law                                                 (2)

3.2) Calculate the probability that a randomly selected person buys a pair of Guess jeans and a Guess top    (rounded off to two decimals).                                           (3)

3.3) Calculate the probability that a randomly selected person buys a Guess top but no pair of Guess jeans (rounded off to two decimals).                                          (3)