The Discrete Random Variable X Is the Number of Students $$\begin{array} { l c c c c r } X & 0 & 1 & 2 & 3 & \text { Total } \\P ( X ) & 40 & 30 & 20 & 10 & 1.00\end{array}$$

question 77

Multiple Choice

The discrete random variable X is the number of students that show up for Professor Smith's office hours on Monday afternoons. The table below shows the probability distribution for X. What is the expected value E(X) for this distribution? $$\begin{array} { l c c c c r } X & 0 & 1 & 2 & 3 & \text { Total } \\P ( X ) & 40 & 30 & 20 & 10 & 1.00\end{array}$$

• A)1.2
• B)1.0
• C)1.5
• D)2.0

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Definitions:

Earn

To receive money as payment for work that has been done or to make a profit.

Simple Interest

Interest calculated only on the initial principal amount of an investment or loan, without compounding.

Third Payment

The payment that occurs as the third in a series or schedule of payments.

Borrowed

Refers to money obtained with an agreement to return it, usually with interest.