Two deaf and dumb guys went to a circus # Puzzle

Two deaf and dumb guys went to a circus

Two deaf and dumb guys Hazard and Pedro went to the Wembley circus.

The entry fee of the circus is 1/2 a dollar i.e 50 cents.

Hazard gave the ticket guy a dollar and without even looking at him, he gave the Hazard two tickets.

How does ticket booth guy know that Hazard needs two tickets and not one?

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