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pooja123 Group Title

a bag contains 3white and 4red balls.two draws of one ball each are made without replacement.what is the probability that one is red and other is white

  • one year ago
  • one year ago

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  1. RadEn Group Title
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    Probability one is red of the first draw is 4/7 Probability one is white of the 2nd draw is 3/6 =1/2 multiply of both up, we get 4/7 * 1/2 = 4/14 = 2/7

    • one year ago
  2. RadEn Group Title
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    does that make sense, @pooja123 ?

    • one year ago
  3. pooja123 Group Title
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    the answer is 4/7.

    • one year ago
  4. RadEn Group Title
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    4/7 is just for the probalility of one red only :) do u want draw 2 balls, right ?

    • one year ago
  5. pooja123 Group Title
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    yes they used the formula like 2into4into3/7into 6

    • one year ago
  6. RadEn Group Title
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    hmm. i dont understand that, actually the formula to get the probability of an event using : P(A) = number of event A / number all event

    • one year ago
  7. nubeer Group Title
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    hmm well she is right the answer would be 4/7

    • one year ago
  8. RadEn Group Title
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    why, can u explain more, nubber ?

    • one year ago
  9. nubeer Group Title
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    we found the probability 2/7 when first red and second white so P[RW] = 2/7 this is one case another possibility is that first is white and second is red P[WR] = 3/7 * 4/6 = 2/7 so total probability of this event = p[WR]+p[RW]

    • one year ago
  10. pooja123 Group Title
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    thanks

    • one year ago
  11. RadEn Group Title
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    wait, is draw it one by one Or 2 balls direct ?

    • one year ago
  12. nubeer Group Title
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    hmm i think one by one...

    • one year ago
  13. RadEn Group Title
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    hmmmm.. yeah, i see now. the question doesnt says the the first draw must red or white, thanks for your corrections @nubeer and sorry for @pooja123 :)

    • one year ago
  14. nubeer Group Title
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    glad to help :)

    • one year ago
  15. pooja123 Group Title
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    thank u guys

    • one year ago
  16. RadEn Group Title
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    im not becareful with this question :)

    • one year ago
  17. pooja123 Group Title
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    k

    • one year ago
  18. 1411akshay Group Title
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    can u see my isosceles triangle solution for one sec

    • one year ago
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