anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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RadEn
  • RadEn
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
RadEn
  • RadEn
does that make sense, @pooja123 ?
anonymous
  • anonymous
the answer is 4/7.

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More answers

RadEn
  • RadEn
4/7 is just for the probalility of one red only :) do u want draw 2 balls, right ?
anonymous
  • anonymous
yes they used the formula like 2into4into3/7into 6
RadEn
  • RadEn
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
nubeer
  • nubeer
hmm well she is right the answer would be 4/7
RadEn
  • RadEn
why, can u explain more, nubber ?
nubeer
  • nubeer
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]
anonymous
  • anonymous
thanks
RadEn
  • RadEn
wait, is draw it one by one Or 2 balls direct ?
nubeer
  • nubeer
hmm i think one by one...
RadEn
  • RadEn
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 :)
nubeer
  • nubeer
glad to help :)
anonymous
  • anonymous
thank u guys
RadEn
  • RadEn
im not becareful with this question :)
anonymous
  • anonymous
k
anonymous
  • anonymous
can u see my isosceles triangle solution for one sec

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