Counting and Probability: Word Problems

Erin received a shipment of $30$ glass ornaments just in time to decorate her tree. Of these $30$ ornaments, $4$ are broken. Erin randomly pulls four ornaments out of the box. If the first two ornaments chosen are broken, what are the chances that the other two broken ornaments are also in that group of four ornaments pulled out of the box? Erin does not return any of the ornaments to the box after she pulls them out.