The Probability Distribution for the Daily Sales at Michael's Co

Multiple Choice

The probability distribution for the daily sales at Michael's Co.is given below. $\begin{array}{cc}\text { Daily Sales } & \\\text { (In } \$ 1,000 \text { s) } & \text { Probability } \\40 & 0.1 \\50 & 0.4 \\60 & 0.3 \\70 & 0.2\end{array}$
The probability of having sales of at least $50,000 is

A) 0.5
B) 0.10
C) 0.30
D) 0.90