anonymous
  • anonymous
help!
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
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
anonymous
  • anonymous

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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
please help! :((((
anonymous
  • anonymous
120?
welshfella
  • welshfella
probability of choosing a red marble = 8 /50 because the number of marbles in bag = 8 and total number of all marbles = 50
welshfella
  • welshfella
so number of marbles expected in 500 trials is |dw:1439322127297:dw|
welshfella
  • welshfella
divide 500 by 50 then multiply the answer by 8
anonymous
  • anonymous
i got 80
anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
yay! your back
welshfella
  • welshfella
80 is correct
anonymous
  • anonymous
yay!
anonymous
  • anonymous
hold on please, i have more @welshfella

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