This Table Shows the Performance of the Selection of 100

question 32

Multiple Choice

This table shows the performance of the selection of 100 stocks after one year. (Take S to be a set of all stocks represented in the table.) Use symbols to describe the event that Internet stock did not increase. How many elements are there in this event $\begin{array}{|l|l|l|l|l|}\hline&\text { Companies }\\\hline& \begin{array}{c}\text { Pharmaceutical } \\\text { P }\end{array} & \begin{array}{c}\text { Electronic } \\\text { E }\end{array} & \begin{array}{c}\text { Internet } \\\text { I }\end{array} &\text {Total } \\\hline \text {Increased V }&15 & 10 & 15 & 40 \\\hline \text {Unchanged N }&15 & 5 & 10 & 30 \\\hline \text {Decreased D }&10 & 5 & 15 & 30 \\\hline \text {Total }&40 & 20 & 40 & 100 \\\hline\end{array}$

• A)The event is \(I \cap V ^ { \prime }\) , the number of elements is 25.
• B) The event is \(I U ( N \cap D )\) , the number of elements is 10.
• C) The event is \(I \cap V ^ { \prime }\) , the number of elements is 10.
• D) The event is \(I \cap N\) , the number of elements is 25.
• E) The event is \(I \cap N\) , the number of elements is 15.

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