Determine the Probability Distribution?s Missing Value A)020
B)0

Multiple Choice

Determine the probability distribution?s missing value. The probability that a tutor sees 0, 1, 2, 3, or 4 students on a given day. $$\begin{array} { l | c | c | c | c | c } \mathrm { x } & 0 & 1 & 2 & 3 & 4 \\\hline \mathrm { P } ( \mathrm { x } ) & ? & 0.15 & 0.20 & 0.20 & 0.25\end{array}$$

A) 0.20
B) 0.50
C) 0.80
D) 1.0