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HamzaBaig

A BAG CONTAINS 12 DISCS. THERE ARE 8 BLUE AND 4 RED DISCS.A DISC IS PICKED OUT AT RANDOM AND NOT REPLACED. A SECOND DISC IS THEN PICKED OUT AT RANDOM AND NOT REPLACED.1) DRAW A TREE DIAGRAM.2)EXPRESS EACH OF UR ANSWER AS A FRACTION IN ITS LOWEST TERMS ,CALCULATE THE PROBABILITY THAT : a) BOTH DISCS ARE RED b) AT LEAST ONE DISC IS BLUE c) A THIRD DISC IS PICKED OUT AT RANDOM.CALCULATE THE PROBABILITY THAT ALL THREE DISCS ARE RED. ...... GUYS NOTE THAT..I HAVE SOLVED ALL THE PARTS BUT PART (c) IS NOT CLEAR TO ME...SO PLZ...IF ANY ONE TRIES TO SOLVE THIS QUESTION JUST TELL ME THE ANSWER OF (c).:)

  • one year ago
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  1. HamzaBaig
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    |dw:1358862778742:dw|

    • one year ago
  2. sauravshakya
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    Your tree diagram looks corect

    • one year ago
  3. sauravshakya
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    P(RRR) =12/132 * 2/10

    • one year ago
  4. sauravshakya
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    got it?

    • one year ago
  5. HamzaBaig
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    OK THANKS FRND..I GOT IT

    • one year ago
  6. sauravshakya
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    welcome

    • one year ago
  7. sauravshakya
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    P(RRR) = 4/12 *3/11 *2/10 =(4*3*2)/(12*11*10) = 1/55

    • one year ago
  8. HamzaBaig
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    OK THANKS AGAIN

    • one year ago
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