Question

John, a house painter, enters into a contract with Robert under which he promises to paint Robert's house for which Robert promises to pay $1,000 at the completion of work. John mistakenly paints Mary's house next door. Mary returns from vacation, surprised to see her house beautifully painted. John asks Mary to pay for the work. Mary refuses. Under what theory may John attempt to recover from Mary? Will he be successful? Explain.

Answer

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