A decade ago, the average class size at Summerfield Middle School was 25 students. Now it is 8% smaller. What is the average class size currently?
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Nationally the average class size in K-12 classrooms is 23 students with a standard deviation of 2.5. What proportion of classrooms has less than 25 students? 21.19% 28.81% 78.81% 80.00%
T. L.
What is the average (arithmetic mean) number of students per class? \begin{equation} \begin{array}{l}{\text { (A) } 24} \\ {\text { (B) } 24.5} \\ {\text { (C) } 25} \\ {\text { (D) } 25.5}\end{array} \end{equation}
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