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‘A[n] * [number] [plural]’ Construction

Why do we need an indefinite article in the sentence "The price is an incredible 50,000 dollars"? "An" is singular, "dollars" is plural.


It’s because the price is one thing, so the fifty grand is being thought of as a single thing, too. This happens with other things that are thought of as a single unit, despite their multiple components. Consider:

  • The trip was a difficult hundred miles.
  • I’ve just had a very painful last three days.
  • It’s an easy five more matches, and then you win the trophy.

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