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It's problems per 100 vehicles. If you add them up, you get problems per 200 vehicles. If you go back to 100 vehicles, you'd have 139 (assuming they round up).

Good catch - I added an edit

And even then, dividing by 2 wouldn't necessary match up, since Rams are just one of multiple Dodge vehicles. (Not sure if the weight of each model is based on sales share or random)

You'd also have to weight it, I'm sure Ram isn't exactly 50% of Dodge's portfolio.