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Mixed-up Order Paradox

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Mixed-up Order Paradox

Welcome to areppim's Probability Calculator!

Beatrice is a smart kid. Hard times forced her to take a temporary job as a pizza deliverer, while searching a more appealing position. Her first delivery has been calamitous. Shortly after hitting the road, a sudden blast of wind took the distribution list away. Impossible to know who ordered what! Beatrice hesitated only a little. As she had noted the addresses in her city plan, she rushed to deliver the hot pizzas to the waiting customers, taking the chance of giving them something different of what they were expecting. Back in the office, she levelled with the supervisor who was outraged and threatened to fire her on the spot. "Please! give me another chance, said Beatrice. The customers got their food still hot, and I am positively sure that one or more got exactly what they ordered!"

Do you reckon Beatrice is making sense?

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