What Is the Expected Number of Phone Calls Per Hour

question 2

Essay

What is the expected number of phone calls per hour based on the following distribution on the number of phone calls per hour?
$\begin{array}{lllll}&\text {A}&\text {B}&\text {C}&\text {D}\\&\text {\# of phone calls } & \text { P\# of phone calls)}&\text { \# of phone calls}&\text { P\# of phone calls) }\\1\\\hline2 & 1 & 0.10 & 1 & 0.10 \\3 & 2 & 0.40 & 2 & 0.50 \\4 & 3 & 0.30 & 3 & 0.80 \\5 & 4 & 0.15 & 4 & 0.95 \\6 & 5 & 0.05 & 5 & 1.00\end{array}$

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Definitions:

Primary Lymphatic Organs

Organs where B and T lymphocytes mature and differentiate, including the bone marrow and thymus.

Red Bone Marrow

A type of bone marrow that produces blood cells, located in the spongy bone.

Thymus

A small organ located in the upper chest, crucial for the development of the immune system's T cells during early life.

Lymph Nodes

Small, bean-shaped structures that are part of the body’s immune system, trapping pathogens and foreign particles.