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Ms. Stafford is hiring teachers for the science department at a new high school. There are $2$ biology teachers and $2$ chemistry teachers to choose from. How many different ways can Ms. Stafford hire a staff that includes one teacher in each subject? $\newline$ $\_\_\_\_$ ways

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Counting principle

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Q. Ms. Stafford is hiring teachers for the science department at a new high school. There are

2

biology teachers and

2

chemistry teachers to choose from. How many different ways can Ms. Stafford hire a staff that includes one teacher in each subject?

\newline

\_\_\_\_

ways

Apply Basic Counting Principle: Apply the Basic Counting Principle. We need to determine the number of ways to hire one biology teacher and one chemistry teacher. Since these are independent choices, we multiply the number of options for each subject. $\newline$ Number of biology teacher choices = $2$ $\newline$ Number of chemistry teacher choices = $2$ $\newline$ Calculate the total number of different ways to hire the teachers. $\newline$ $2$ (biology choices) $\times$ $2$ (chemistry choices) = $4$ ways

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