To make 12 ounces of hot chocolate, 3 tablespoons of cocoa are needed. How many tablespoons of cocoa are needed to make 72 ounces of hot chocolate?

72 ounces is 6 times as much hot chocolate as 12 ounces, since 72 ÷ 12 = 6. Multiply the cocoa by the same factor: 3 × 6 = 18 tablespoons. So the correct choice is 18 tablespoons.

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