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*A certain globular cluster has a total of 10^4 stars; 100 of them have MV=0.0, and the rest have MV=+5.0. What is the integrated visual magnitude of the cluster?*

Nowhere in our class notes or textbook is the term "integrated visual magnitude" defined. Googling it, I find the term used, but not defined.

If I had to guess how to do this problem, I'd just do a weighted average:

[tex]M_{cluster}=\frac{(100*0.0)+(9900*5.0)}{10000}[/tex]

[tex]M_{cluster}=4.95[/tex]

Which when rounded for significant figures = 5.0