Math 221

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A distribution center receives shipment of a product from three different factories in the quantities of 60, 30 and 20. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from the second factory and (b) none of the three products came from the second factory
(a) The probability that all products came from the second factory is
(b) The probability that none of the three products came from the second factory is

  • Math 221 -

    (a) looks to me like it will be

    (30/110)(29/109)(28/108)

    Do (b) similarly.

    This is just like the problems involving drawing from a deck of cards.

  • Math 221 -

    .019

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