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

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