Which Bag Contains the Counterfeit Coins?

Imagine you have 10 bags full of coins,

and each bag contains 1000 coins.

One of the bags contains counterfeit coins.

A real coin weighs 1 gram,

while a counterfeit coin weighs 1.1 grams.

Using a scale just one time,

how can you identify which bag contains the counterfeit coins?

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