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6 May, 18:29

Iro has a stack of cards with one number from the set 1, 1, 2, 2, 3, 3, 3, 4 written on each card. What is the probability that he pulls out a 3 first and then pulls out a 2 without replacing them?

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  1. 6 May, 22:01
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    Das ain't geography

    but anyways

    so

    probablity=desired outcomes/total possible

    and when they are dependent events, like picking 1 then another from the same pile, then we multiply them

    so

    pulls out a 3 first

    there are three 3's

    there are 8 cards

    so 3/8 is probality of a 3

    then we have 7 cards left

    pulls out a 2

    there are 2 cards

    so 2/7

    multiply 3/8 and 2/7 to get 6/56 or 3/28

    probablity is about 10.7% or about 11%
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