A few years ago, the following question and expression appeared on boxes of Swiss Miss Hot Cocoa Mix:
On average, how many mini-marshmallows are in one serving?
3 + 2 × 4 ÷ 2 − 3 × 7 − 4 + 47
WHAT WENT WRONG? Explain the algebraic error that somebody at the company made in calculating the answer.

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