anonymous
  • anonymous
There are 3 red, 1 blue, and 2 yellow marbles in a bag. Once a marble is selected, it is not replaced. Probability of red then blue
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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sandra
  • sandra
hmmm interesting, going to have to brush up on prob really quick
anonymous
  • anonymous
ok no problem
sandra
  • sandra
ok so this looks like the right track... but it's not exactly easy

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sandra
  • sandra
http://www.onlinemathlearning.com/probability-without-replacement.html
anonymous
  • anonymous
so do you know the answer?
anonymous
  • anonymous
I like need help badly!
sandra
  • sandra
well, the red has to be selected first
sandra
  • sandra
so the probability of that is 3/6 (1/2)
sandra
  • sandra
now you need the next one to be blue
sandra
  • sandra
bu there are less reds left - one less in fact
sandra
  • sandra
so the probability of a blue at that point is 1/5
sandra
  • sandra
so that means the total probability is 1/2 * 1/5 = 1/10
anonymous
  • anonymous
so its 1/10?
sandra
  • sandra
yep
anonymous
  • anonymous
ok thnk you
sandra
  • sandra
np =)

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