In a Completely Randomized Design Involving Three Treatments, the Following

Multiple Choice

In a completely randomized design involving three treatments, the following information is provided: $$\begin{array} { l c c c } & \text { Treatment 1 } & \text { Treatment2 } & \text { Treatment } 3 \\\text { Sample size } & 5 & 10 & 5 \\\text { Sample mean } & 4 & 8 & 9\end{array}$$ ? The overall mean for all the treatments is ______.

A) 7.00
B) 6.67
C) 7.25
D) 4.89