GRE General Test: QR-295151 GRE Quantitative Reasoning

 
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How is the answer 9???

The only categories the have less than 50 mg are "Decaffeinated Coffee", "Instant Tea", " "Cocoa" "Caffeinated Soft drinks" and "Cold and allergy remedies" and that is 5...

read the question carefully, look:

can the amount of caffeine in the given serving size be less than 50 milligrams?

so there are only two categories more than 50 milligrams: drip-brewed coffee and weight loss drugs. so the left is: 9 categories.