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A fair coin is tossed

  1. Sep 29, 2009 #1
    A fair coin is tossed. If the upface is a head, the coin is tossed again. If the upface is a tail, then a fair die is tossed.

    1. Find P(2heads)
    2. Find p(an even number appears)




    2. Relevant equations..none



    My attempt at a solution..........Probability of getting 1 head is 1/2. So two heads would be 1/2 times 1/2=1/4??? And I have no idea for the 2nd question....please help!
     
  2. jcsd
  3. Sep 29, 2009 #2

    LCKurtz

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    Hint: What two things have to happen for an even number to appear? What are their probabilities? So...
     
  4. Sep 29, 2009 #3
    To get an even number, the upface should be tail (p=1/2) and roll an even number on a fair die (1/6x3even numbers on a die)... 1/2x1/6x3....so is 1/4 correct?
     
  5. Sep 29, 2009 #4

    LCKurtz

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