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Find the mean number

  1. Feb 11, 2009 #1
    the deadly Ebola virus kills 85% of those who contract it. Of the next 100000 people who contract it, what is the mean number who will die?
  2. jcsd
  3. Feb 11, 2009 #2

    Tom Mattson

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    And your thoughts on the matter are___________?
  4. Feb 11, 2009 #3
    I'm thinking it's:

    85% of 100 000 which is 85 000 but i'm not really sure of that
  5. Feb 11, 2009 #4


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    Why not?
  6. Feb 12, 2009 #5


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    The mean is the "expected value". You are told that 85% die. Of 1000000 people, how many would you expect to die?
  7. Feb 12, 2009 #6
    if it's 85% of 100 000 then 85 000 will die
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