Answer:
0.55
Explanation:
From the question, the number an dpercentage at which Danny attends concerts are;
• Twice a week 5% of the time.
,• Once a week, 45% of the time.
,• 0 times a week, 50% of the time.
Let X be a random variable representing the number of times Danny attends a concert during a week. The table below shows the disdtibution of X.
Next, we find the expected value for the number of times Danny attends a concert during a week:
[tex]\begin{gathered} E(X)=\sum xP(x) \\ =(0\times0.5)+(1\times0.45)+(2\times0.05) \\ =0+0.45+0.1 \\ =0.55 \end{gathered}[/tex]Therefore, the expected value for the number of times Danny attends a concert during a week is 0.55.
