Use the Following to Answer the Question(s) Below

Use the following to answer the question(s) below.
A men's clothing store has determined the following probability distribution for the number of special size orders placed per month. The distribution is as follows:
Number Ordered Probability
0 0.10
5 0.10
10 0.12
15 0.30
20 0.38
-The number of special size orders this men's clothing store can expect per month is

A) 13.8.
B) 20.
C) 15.
D) 14.2.
E) 12.5.