anonymous
  • anonymous
Find the probability of picking a blue marble and a yellow marble when 2 marbles are picked (without replacement)from a bag containing 4 blue and 5 yellow marbles.
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Write a proportion
anonymous
  • anonymous
how am i suppose to do that?
anonymous
  • anonymous
Do you know how to write a proportion? It's two fractions equal to each other. If you need more help, go on Kahn Academy

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jim_thompson5910
  • jim_thompson5910
4 blue + 5 yellow = 9 total the probability of picking a blue marble on the first draw is (# of blue)/(# total) = 4/9
jim_thompson5910
  • jim_thompson5910
no replacements are made, so after the first draw we have 9-1 = 8 marbles left over. There are still 5 yellow marbles the probability of picking yellow on the second draw is (# of yellow)/(# of marbles left) = 5/8
anonymous
  • anonymous
what about the yellow
jim_thompson5910
  • jim_thompson5910
multiply the two fractions to get the answer
anonymous
  • anonymous
oh

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