nuccioreggie
  • nuccioreggie
A box has 1 red marble, 3 blue marbles, and 4 green marbles. Maya draws a blue marble randomly from the box, replaces it, and then draws another marble randomly. What is the probability of drawing 2 blue marbles in a row? Explain your answer.
Mathematics
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SOLVED
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jamiebookeater
  • jamiebookeater
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taramgrant0543664
  • taramgrant0543664
There are a total of eight marbles that she can draw. Each time she draws there is 3 blue marbles that she can pick. So her chance of picking one blue marble out of the bad is 3/8
anonymous
  • anonymous
find the probability of drawing one blue marble
anonymous
  • anonymous
then do that times the same probability

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anonymous
  • anonymous
so 3/8*3/8
taramgrant0543664
  • taramgrant0543664
Since she wants two blue marbles her chance of picking a blue marble the second time is also still 3/8 since she put the marble back in after she drew it the first time
taramgrant0543664
  • taramgrant0543664
So then the overall probabity is just multiplying the two probabilities together 3/8 * 3/8
anonymous
  • anonymous
exactly

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