Consider the baggage check$-$in of a small airline. Check$-$in data indicate that from $9$ a$.$m$.$ to $10$ a$.$m$.,300$ passengers checked in$.$ Moreover, based on counting the number of passengers waiting in line, airport management found that the average number of passengers waiting for check$-$in was $35.$ How long did the average passenger have to wait in line? Find the answer in minutes.