Answer:
[tex]40[/tex]
Step-by-step explanation:
[tex]We\ are\ given:\\No.\ of\ observations=8\\Sum\ of\ these\ observations=320\\Now,\\As\ we\ know\ that,\\Mean=\frac{Total\ Sum\ of\ the\ observations}{Total\ No.\ of\ observations} \\Hence\ here,\\Mean\ of\ the\ observations\ given=\frac{320}{8}=40[/tex]