anonymous
  • anonymous
A bag contains 50 marbles, 10 of which are blue, 8 are red, 20 are green, and 12 are purple. Marcie takes a marble out of the bag, records the color, and returns it to the bag. How many red marbles should she expect after 500 trials? 80 100 120 200
Mathematics
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
A ?
anonymous
  • anonymous
well.i would do it cuz i subtracted 50 minus everything ...so yea i would go with tht :)
anonymous
  • anonymous
OKay thank you

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welshfella
  • welshfella
probability of drawing a red marble on one draw = 8/50 = 4/25
welshfella
  • welshfella
expected number of reds for 500 trials = 4/25 * 500 = 4*20 = 80

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