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Math Help - True or False Probabilites Statements

  1. #1
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    Probability of students seeing the same movies

    Of 2100 students surveyed:
    900 saw Avatar
    500 saw Memento
    300 saw both movies


    How many saw:

    a)Avatar or Memento?



    b)Avatar but not Memento?



    c)Memento but not Avatar?



    d) Neither movie?
    Last edited by superpowerspacemonkey; April 28th 2010 at 12:50 PM.
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  2. #2
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    Hello, superpowerspacemonkey!

    Draw a Venn diagram or . . .


    Of 2100 students surveyed:
    . . 900 saw Avatar
    . . 500 saw Memento
    . . 300 saw both movies
    Place the information in a chart . . .


    . . \begin{array}{c|| c|c|| c|}<br />
& \text{Memento} & \sim\text{Memento} & \text{Total} \\ \hline \hline<br /> <br />
\text{Avatar} & 300 & & 900 \\ \hline<br />
\sim\text{Avatar} & & & \\ \hline \hline\<br />
\text{Total} & 500 & & 2100 \\ \hline \end{array}


    Fill in the missing numbers and answer the questions.

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  3. #3
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    Thanks!!!
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