Use the Combinations Formula
Use the Formula For $$\mathrm { n } ^ { \mathrm { C } _ { \mathrm { r } } }$$

question 54

Multiple Choice

Use the Combinations Formula
Use the formula for
$$\mathrm { n } ^ { \mathrm { C } _ { \mathrm { r } } }$$ to evaluate the expression.
- $9 C _ { 5 }$

• A) 126
• B) 3024
• C) 72,576
• D) 15,120

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Definitions:

Blood

A vital fluid in organisms that transports necessary substances such as nutrients and oxygen to the cells and carries waste products away.

Thymus Gland

A primary lymphoid organ of the immune system, located in the upper anterior part of the chest cavity, playing a vital role in the development of T cells.

White Blood Cells

Cells of the immune system that help protect the body against infections and foreign invaders, including bacteria, viruses, and parasites.

Allergic Responses

The immune system’s hypersensitive reactions to normally harmless substances, such as pollen or food.