A librarian arranges chairs in rows for an event

MATHEMATICS · Subjective · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

A librarian arranges chairs in rows for an event. The first row has 12 chairs, the second row has 14 chairs, the third row has 16 chairs, and so on. Explain why the number of chairs in successive rows forms an arithmetic progression.

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