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Jen went to Great electronic shop that has a big sale on computers. The accompanying...

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Accounting

Jen went to Great electronic shop that has a big sale on computers. The accompanying table gives the number of items falling in each type of computer-sales category.

                 laptop       desktop

10% off     50                10

     

25% off     30                 60


Required

  1. What is the probability that a randomly selected item is 10% off?
  2. Given that laptop is chosen, what is the probability that it is 10% off?
  3. Are computer type and sales independent? Why?

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