A bag contains 7 white marbles and 35 orange marbles. If a representative sample contains 3 white ​marbles, then how many orange marbles would you expect it to​ contain? Explain.
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Part 1
Because the ratio of white marbles to orange marbles is
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in the​ population, the expected number of orange marbles is
  
enter your response here times the number of white marbles in the representative sample. There should be
  
enter your response here orange marbles.